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  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  The Journey of the Ladybug - $7 Science Quiz

  The Journey of the Ladybug
   
  
  I have black dots on my red body. The shape of my body is round or half-sphered. I have six short legs and antennae. You may not know this, but I use my attractive colors and spots to fend of my predators! People call...

  • November 14, 2021

  • Digbijoy Azad likes this.
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  • 
    Tanveer Tausif Ratul To live in a closed eco-system,an animal/plant must need air & foods.While putting the ladybug in the container,some air entered into the container and was trapped inside.
    That air obviously contained some oxygen and CO2.Plants
    need CO2 to live.They...  moreTo live in a closed eco-system,an animal/plant must need air & foods.While putting the ladybug in the container,some air entered into the container and was trapped inside.
    That air obviously contained some oxygen and CO2.Plants
    need CO2 to live.They inhaled the CO2 and exhaled the
    Oxygen.With the Oxygen released by the plants,the ladybug survived and it exhaled CO2.The plants then again used the CO2 and exhaled Oxygen.In this way,it continues in a cycle.
    For making food,plants need 4 things: water,mineral,CO2
    and sunlight.Water and mineral is available in the wet soil.CO2 is available in the air,whereas,sunlight is also saying ‘hi’ there!So?Food prepared!
    Again,the main food of ladybug is small insect called ‘Aphid’,which sucks the juice of plants and live there.So, ladybug is getting enough food for her.This is how they both are surviving in the closed container.  less

    • November 14, 2021
  • 
    Zarin sadaf snigdha Before we answer this question we need to get enlightened on a biological term, symbiosis. Symbiosis means interaction between two dissimilar organism where both benefit from being with each other. When we are putting the ladybug and the plants inside...  moreBefore we answer this question we need to get enlightened on a biological term, symbiosis. Symbiosis means interaction between two dissimilar organism where both benefit from being with each other. When we are putting the ladybug and the plants inside the glass jar they are getting sealed from the rest of the world. The ladybug respires which releases carbon dioxide, which is taken up by the leaves of the plant. The leaves also get sufficient sunlight from the sun as the glass is transparent. And it also gets minerals from the charcoals in the soil ans as the soil was wet plants can absorb water from it too . The plants use this for photosynthesis and to produce oxygen and glucose. The glucose is used by the plants for food and the oxygen is used by the ladybug for respiration. The ladybug also feeds on the plants to survive. This is how the plant and the ladybug depends on each other to survive. This is known as symbiosis and this is why the plant and the ladybug both survived even if the container...    less

    • November 14, 2021
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    sadia islam safa In that container,an small ecosystem was created. Plants produce their own oxygen during photosynthesis and by using that, bug is still alive. Bugs breath through openings in the thorax and abdomen called spiracles. For plants,those gravels will hold...  moreIn that container,an small ecosystem was created. Plants produce their own oxygen during photosynthesis and by using that, bug is still alive. Bugs breath through openings in the thorax and abdomen called spiracles. For plants,those gravels will hold water and increase humidity. Charcoal increases the soils ability to hold onto plant nutrients and from wet soil plants get water. So using all of that in the process of photosynthesis,plant is growing and producing foods,oxygens and heat energy. This is how plants and the ladybug are still surviving in that closed container.  less

    • November 14, 2021
  • 
    Shadman Chowdhury The ladybug and plants inside the closed container can still survive because of photosynthesis. Plants have a process called photosynthesis which requires CO2 and sunlight to produce carbohydrates, water and oxygen for the plants' growth. Those plants...  moreThe ladybug and plants inside the closed container can still survive because of photosynthesis. Plants have a process called photosynthesis which requires CO2 and sunlight to produce carbohydrates, water and oxygen for the plants' growth. Those plants need carbon dioxide to grow (plants absorb carbon dioxide through their stomata). For our container analogy, we can say that the plants inside the container are using photosynthesis to create their own food supply from sunlight and CO2. The gravel supplies nutrients such as nitrogen, magnesium and phosphorus which play important role in plant growth. Charcoal also acts like gravel by keeping up humidity levels for optimum growth conditions. The ladybug eats the plants, but both organisms benefit from receiving nutrients from each other.  less

    • November 14, 2021
  • 
    Digbijoy Azad The ladybug is living in an ecosphere. However, the ladybug is not alone. Bacteria, protozoa, algae, smaller worms, and plants are also crucial members of the jar.
    Few things ladybug needs to live-
    -Oxygen.
    -Food...  moreThe ladybug is living in an ecosphere. However, the ladybug is not alone. Bacteria, protozoa, algae, smaller worms, and plants are also crucial members of the jar.
    Few things ladybug needs to live-
    -Oxygen.
    -Food source.
    -Clean air that does not contain harmful gas like ammonia.
    -Suitable humidity
    -Available water source
    The jer fulfills the requirements like this-
    *Plants and algae give oxygen and get Co2 from ladybugs and other organisms.
    *Plants get energy from the sun and provide food for organisms. The energy stays almost the same as bacteria and protozoa decompose dead organisms and fallen leaves.
    *Bacteria and protozoa break down the waste and make ammonia into nitrate that plants can take. So the air stays clean.
    *Charcoal removes excess humidity.
    *Water evaporates but comes back to the system like rain.
    The jer completes the energy cycle, Co2 cycle, Oxygen Cycle, Hydrogen cycle, decomposition, and controls humidity and air quality. So, Ladybug and her friends can live happily by supporting each other.  less

    • November 14, 2021
• 
  Fatima Ahmed: Zarin's writing on our latest English writing project. It is absolutely fantastic. There are some logical information here and all those technical aspects were carefully solved in easy, interesting English. Superb. We liked the drone name too. Here is...  moreZarin's writing on our latest English writing project. It is absolutely fantastic. There are some logical information here and all those technical aspects were carefully solved in easy, interesting English. Superb. We liked the drone name too. Here is her full writing link and screenshot of her story: https://docs.google.com/document/d/1f5Es2x2R8OsEEeJtFDvwTn_cHL59yZR8/edit?usp=sharing&ouid=106512088825710967320&rtpof=true&sd=true  less

  

  • October 27, 2021
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  Zarin sadaf snigdha liked Fatima Ahmed's photo.

  

  Zarin's writing....very thrilling story. Keeps you wondering what will happen next. Good read. Her full story can be found here and here is her story screenshot: https://drive.google.com/file/d/1TnJ2U01N29UNhsgjw1bZvjsmLjQWP4kA/view?usp=sharing

  • October 9, 2021

  • Zarin sadaf snigdha likes this.
• 
  Fatima Ahmed: Zarin's writing....very thrilling story. Keeps you wondering what will happen next. Good read. Her full story can be found here and here is her story screenshot: https://drive.google.com/file/d/1TnJ2U01N29UNhsgjw1bZvjsmLjQWP4kA/view?usp=sharing

  

  • October 9, 2021

  • Zarin sadaf snigdha likes this.
• 
  Fatima Ahmed: Hi Zarin, thanks for submitting your answer for the Physic's quiz on Tanguar Haor. You used a formula and explained everything accordingly with very clear description. It was good read and easy for the admins to understand. Overall, nice answer. ...  moreHi Zarin, thanks for submitting your answer for the Physic's quiz on Tanguar Haor. You used a formula and explained everything accordingly with very clear description. It was good read and easy for the admins to understand. Overall, nice answer. Here is the link for everyone to read your answer in more details and we attached a screenshot of your answer here also: https://drive.google.com/file/d/1EjQvSW3BIqVxPmsPsKHtpmK-VCtq4DXe/view?usp=drivesdk  less

  

  • September 3, 2021
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  Raihan Quddus is now friends with Zarin sadaf snigdha .

  • September 2, 2021
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  • September 2, 2021
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  Zarin sadaf snigdha joined the group Free Tutoring Group

  • August 28, 2021
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  Zarin sadaf snigdha follow Sifatul Islam Chowdhury Kabbo .

  • August 20, 2021
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  Noshin Tasnia is now friends with Zarin sadaf snigdha .

  • August 5, 2021
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  Zarin sadaf snigdha liked Fatima Ahmed's classified listing.

  

  Games R' Us Giraffes - $7 Mathematics Quiz

  Games R' Us Giraffes - $7 Mathematics Quiz
   
  
  David’s project deadline was approaching soon. That day, he was still sitting at his desk after office hours and was still thinking the best way to finish his project on time. He was exited after...

  • July 30, 2021

  • Zarin sadaf snigdha likes this.
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  • 
    Nirjona Akter Why this formula will work?
    
    This method will work when all the sides are of the same length. Then, we can find the volume of a cube just knowing the measurement of only one side. If a cube has side length "x" then Volume = x × x × x a which results in...  moreWhy this formula will work?
    
    This method will work when all the sides are of the same length. Then, we can find the volume of a cube just knowing the measurement of only one side. If a cube has side length "x" then Volume = x × x × x a which results in the formula, Volume = x³. This is where we get the term called"cubed". When we use power to the 3 over something, we call it cubed. When units of Measure are calculated, we find the volume of an object, and the units are cubed. This means that if the measurements of the sides are in miters, then the answer will be in cubed miters.  less

    • July 31, 2021
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    Shaikh Nafisa Binte Fahad ''How will it work?''
    In question, it represents the subject of ‘similarity statistics’. This means that the ratio of height, length, and width will be the same.
    In the equation, we are seeing that the dimension of both the values are different which...  more''How will it work?''
    In question, it represents the subject of ‘similarity statistics’. This means that the ratio of height, length, and width will be the same.
    In the equation, we are seeing that the dimension of both the values are different which needs to be equal. Over here, the height is a one-dimensional unit(meter) but the volume is three-dimensional (meter^3). So, we need to cube it to make it evenly dimensional.
    ''Why would it work?''
    Otherwise, it is not according to the rules and the answer will be wrong.
    So, given,
    Height of small giraff= 4m
    = 4 x 4 x4 = 216m^3
    Height of big giraff= 6m
    = 6x 6 x6 = 64 m^3
    Volume of big giraff= 5400m^3
    and, let the volume of small giraffe be 'x' m^3.
    Now. we know,
    the formula of similarity,
    Height of big giraffe/Height of small giraffe=Volume of big giraffe/Volume of small giraff.
    ==> 216/64 = 5400/ 'x'
    ==>216x =345600
    ==> x =1600
    Therefore, the volume of the small giraff is 1600 m^3.  less

    • July 31, 2021
    • -
    • 1 likes this
  • 
    Noorjahan Binte Farhana There is given Small and tall giraffe height. And the tall giraffe volume is 5400 meter queb. volume= length × width × height.
    consume the length X and width Y for tall and small giraffe
    so, for tall giraffe...  moreThere is given Small and tall giraffe height. And the tall giraffe volume is 5400 meter queb. volume= length × width × height.
    consume the length X and width Y for tall and small giraffe
    so, for tall giraffe X*Y*6=5400
    XY=5400/6
    XY= 900
    Now, for small giraffe volume X*Y*4
    900*4=3600 [ we have find out XY=900]
    The tall giraffe is 1.5 tall more than small giraffe.
    as, 3600*1.5=5400  

    • August 1, 2021
  • 
    Jesmin Akhter given,
    Bigger giraff height = 6m
    And the volume of bigger giraff = 5400m^3
    we know a formula...  moregiven,
    Bigger giraff height = 6m
    And the volume of bigger giraff = 5400m^3
    we know a formula that,
    volume = lenght * wide * hight
    let, lenght = a, wide = b
    so, volume = lenght * wide * hight
    => 5400m^3 = a * b * 6m
    => ab = 5400m^3 / 6m
    => ab = 900m^2 ...........(i)
    given, Smaller giraff hight = 4m
    know we have to be findout the volume of smaller giraff.
    let, volume of smaller giraff = x
    leangth = a
    wide = b
    we know,
    valume = length * wide * hight
    => x = ab * 4m
    => x = 900m^2 * 4m [ puting the value of a and b from equation...    less

    • August 1, 2021
  • 
    Nur E ferdus Monika matin At first, it is mentioned that both giraffes are similar. That means the ratio of height, length,
    width, and the dimension of each part will be the same for the two Giraffe. The volume of a
    three dimensional figure is- volume= length X width X height so,...  moreAt first, it is mentioned that both giraffes are similar. That means the ratio of height, length,
    width, and the dimension of each part will be the same for the two Giraffe. The volume of a
    three dimensional figure is- volume= length X width X height so, Volume(Small)/Volume
    (Large)=Length(s)×width(s)×Height(s)/Length×width×Height
    Height(s)/Height=4/6=2/3 So, Length(s)/ Length=2/3 and width(s)/width=2/3
    Volume(Small)/Volume (Large)= (2/3) ×(2/3)×(2/3) Volume(Small)= (8/27)× Volume (Large)
    = (8/27) × 5400 m^3 = 1600 m^3 This formula will work because If we calculate volume part
    by part and make a sum to get the total volume of the small giraffe as it is irregular-shaped,
    it will remain unchanged because each part maintains the same ratio of 2/3 with the large
    Giraffe as both are similar.  less

    • August 1, 2021
• 
  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  Games R' Us Giraffes - $7 Mathematics Quiz

  Games R' Us Giraffes - $7 Mathematics Quiz
   
  
  David’s project deadline was approaching soon. That day, he was still sitting at his desk after office hours and was still thinking the best way to finish his project on time. He was exited after...

  • July 30, 2021

  • Zarin sadaf snigdha likes this.
  • View all 14 comments
  • 
    Nirjona Akter Why this formula will work?
    
    This method will work when all the sides are of the same length. Then, we can find the volume of a cube just knowing the measurement of only one side. If a cube has side length "x" then Volume = x × x × x a which results in...  moreWhy this formula will work?
    
    This method will work when all the sides are of the same length. Then, we can find the volume of a cube just knowing the measurement of only one side. If a cube has side length "x" then Volume = x × x × x a which results in the formula, Volume = x³. This is where we get the term called"cubed". When we use power to the 3 over something, we call it cubed. When units of Measure are calculated, we find the volume of an object, and the units are cubed. This means that if the measurements of the sides are in miters, then the answer will be in cubed miters.  less

    • July 31, 2021
  • 
    Shaikh Nafisa Binte Fahad ''How will it work?''
    In question, it represents the subject of ‘similarity statistics’. This means that the ratio of height, length, and width will be the same.
    In the equation, we are seeing that the dimension of both the values are different which...  more''How will it work?''
    In question, it represents the subject of ‘similarity statistics’. This means that the ratio of height, length, and width will be the same.
    In the equation, we are seeing that the dimension of both the values are different which needs to be equal. Over here, the height is a one-dimensional unit(meter) but the volume is three-dimensional (meter^3). So, we need to cube it to make it evenly dimensional.
    ''Why would it work?''
    Otherwise, it is not according to the rules and the answer will be wrong.
    So, given,
    Height of small giraff= 4m
    = 4 x 4 x4 = 216m^3
    Height of big giraff= 6m
    = 6x 6 x6 = 64 m^3
    Volume of big giraff= 5400m^3
    and, let the volume of small giraffe be 'x' m^3.
    Now. we know,
    the formula of similarity,
    Height of big giraffe/Height of small giraffe=Volume of big giraffe/Volume of small giraff.
    ==> 216/64 = 5400/ 'x'
    ==>216x =345600
    ==> x =1600
    Therefore, the volume of the small giraff is 1600 m^3.  less

    • July 31, 2021
    • -
    • 1 likes this
  • 
    Noorjahan Binte Farhana There is given Small and tall giraffe height. And the tall giraffe volume is 5400 meter queb. volume= length × width × height.
    consume the length X and width Y for tall and small giraffe
    so, for tall giraffe...  moreThere is given Small and tall giraffe height. And the tall giraffe volume is 5400 meter queb. volume= length × width × height.
    consume the length X and width Y for tall and small giraffe
    so, for tall giraffe X*Y*6=5400
    XY=5400/6
    XY= 900
    Now, for small giraffe volume X*Y*4
    900*4=3600 [ we have find out XY=900]
    The tall giraffe is 1.5 tall more than small giraffe.
    as, 3600*1.5=5400  

    • August 1, 2021
  • 
    Jesmin Akhter given,
    Bigger giraff height = 6m
    And the volume of bigger giraff = 5400m^3
    we know a formula...  moregiven,
    Bigger giraff height = 6m
    And the volume of bigger giraff = 5400m^3
    we know a formula that,
    volume = lenght * wide * hight
    let, lenght = a, wide = b
    so, volume = lenght * wide * hight
    => 5400m^3 = a * b * 6m
    => ab = 5400m^3 / 6m
    => ab = 900m^2 ...........(i)
    given, Smaller giraff hight = 4m
    know we have to be findout the volume of smaller giraff.
    let, volume of smaller giraff = x
    leangth = a
    wide = b
    we know,
    valume = length * wide * hight
    => x = ab * 4m
    => x = 900m^2 * 4m [ puting the value of a and b from equation...    less

    • August 1, 2021
  • 
    Nur E ferdus Monika matin At first, it is mentioned that both giraffes are similar. That means the ratio of height, length,
    width, and the dimension of each part will be the same for the two Giraffe. The volume of a
    three dimensional figure is- volume= length X width X height so,...  moreAt first, it is mentioned that both giraffes are similar. That means the ratio of height, length,
    width, and the dimension of each part will be the same for the two Giraffe. The volume of a
    three dimensional figure is- volume= length X width X height so, Volume(Small)/Volume
    (Large)=Length(s)×width(s)×Height(s)/Length×width×Height
    Height(s)/Height=4/6=2/3 So, Length(s)/ Length=2/3 and width(s)/width=2/3
    Volume(Small)/Volume (Large)= (2/3) ×(2/3)×(2/3) Volume(Small)= (8/27)× Volume (Large)
    = (8/27) × 5400 m^3 = 1600 m^3 This formula will work because If we calculate volume part
    by part and make a sum to get the total volume of the small giraffe as it is irregular-shaped,
    it will remain unchanged because each part maintains the same ratio of 2/3 with the large
    Giraffe as both are similar.  less

    • August 1, 2021
• 
  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  Mithy’s Sweet Room Cupcakes - $7 Business Studies Quiz

  Mithy’s Sweet Room Cupcakes - $7 Business Studies Quiz
   
  
  ‘Sweet room’ is an online shop that sells amazing cupcakes to people all around Dhaka. The owner of this shop, Mithy has rented a two-room house in Dhanmondi to make the c...

  • July 27, 2021

  • Mahi Imran likes this.
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  • 
    Mouna Mehnaz https://docs.google.com/document/d/1_r0Wed6bO5BIKHGWPB_4B-JdcsOT75IxgbkgTaRcNjE/edit?usp=sharing

    • July 28, 2021
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    • 1 likes this
  • 
    Nirjona Akter https://drive.google.com/file/d/1l2zHdC4sXc96R7DBdoWdzAUKTYV1dHvK/view?usp=drivesdk

    • July 28, 2021
    • -
    • 1 likes this
  • 
    Mujtaba Rafid Let's clear the math first(just for the sake of it)-
    Housing cost- BDT 10,000
    Total cost of employees- BDT 10,000
    Total fixed cost- 10,000 + 10,000= 20,000...  moreLet's clear the math first(just for the sake of it)-
    Housing cost- BDT 10,000
    Total cost of employees- BDT 10,000
    Total fixed cost- 10,000 + 10,000= 20,000 taka
    Sales price per unit- BDT 500
    Variable cost per unit- BDT 250
    Sales price per unit - Variable cost per unit= BDT 250
    So the break-even point= 20,000/250= 80
    So basically, Mithy needs to sell 80 cupcakes per month to make sure that the cost and total revenue are equal.
    So what can she do to increase her sales?
    A tricky question that does not have a straightforward answer because it includes so many variables.
    All we can do is to lay out some tips.
    Since the cupcakes are amazing, she can take a bit of risk. She can invest more money and spend more money on marketing. For example, she can use it to boost her Facebook business page to get more traction or hire a part-time online marketer who will keep a close eye on her customers and see what they want. It will be risky because the break-even point will be higher which means she must sell more...    less

    • July 29, 2021
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    • 1 likes this
  • 
    Jaima Jahin https://docs.google.com/document/d/13ZP_R4_y-QUsOtWRa3gt2fnFB1WO0VMyqcW3NoGy1pg/edit?usp=sharing

    • July 29, 2021
    • -
    • 1 likes this
  • 
    Zakaria Ahomed https://docs.google.com/document/d/1_bqyV1IkV7fxtPx-Rl9oTbDKR1m-yfPsaBKiGV3zI8M/edit?usp=drivesdk

    • July 29, 2021
    • -
    • 1 likes this
• 
  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  Jamil's Economics Enthusiasm

  Jamil's Economics Enthusiasm
   
  
  It was a bright sunny day when Jamil setup his laptop in his room. He was curious to check if his Economics teacher assigned him any homework. In the COVID pandemic, online classes and digital homework were the norm...

  • July 15, 2021

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  • 
    Shadman Chowdhury In a recent report, Bangladesh is said to be 10th in the world as far as the female labor force participation (FLFP) index is concerned. According to this index, FLFP of Bangladesh has increased by a lot because in 2008, it was merely 16 percent and now...  moreIn a recent report, Bangladesh is said to be 10th in the world as far as the female labor force participation (FLFP) index is concerned. According to this index, FLFP of Bangladesh has increased by a lot because in 2008, it was merely 16 percent and now it is 21 percent. This change can be attributed to women's increasing awareness about their role as well as an increase in access of education and job opportunities for them.
    
    The 2011 World Development Report from the World Bank estimates that if half of all unemployed youth were put into jobs tomorrow, global gross domestic product would increase by more than $2 trillion over the next five years—equal to more than 10% of global GDP!
    
    As a result of women empowerment in job sector in Bangladesh, there is an increase in women contribution to household income. In addition, it improves women's bargaining power within their families which is particularly important in promoting the health and education of children.  less

    • July 11, 2021
  • 
    Nishat Tamanna Women are almost half of the total population which is more than 8 crores. Without the participation of this huge population in the job sector, it wouldn't be possible for Bangladesh to be enlisted as a developing country. The largest contribution of...  moreWomen are almost half of the total population which is more than 8 crores. Without the participation of this huge population in the job sector, it wouldn't be possible for Bangladesh to be enlisted as a developing country. The largest contribution of women in economy is in the RMG sector (among 4 million workers, 70% of them are women), & we know 12% of the GDP is contributed by this sector. Though most of the contribution of women in the agriculture (in homestead production,post-harvest production, livestock rearing etc.) is as unpaid labor, still this adds huge value to the economy. Day by day, the participation of women in the high quality services is increasing which will also help breaking the taboo of women refrained from economic activities.  less

    • July 11, 2021
  • 
    Hymanti Sarkar Now-a-days women are working in every sector like public sector and private sector etc. In village side, they work in field, they rear cow, goat, poultry etc. By this way, they are making their economic condition better as well as our country. Women...  moreNow-a-days women are working in every sector like public sector and private sector etc. In village side, they work in field, they rear cow, goat, poultry etc. By this way, they are making their economic condition better as well as our country. Women entrepreneurship is important for our economic develoment. They are contributing in SME sectors like restaurant, cottage industry, garments etc. But this pandemic makes it difficult. But we can see new entrepreneurs in online business where most of them are women with new ideas. By different ways, they are showing our native products to world.  less

    • July 11, 2021
  • 
    Zarin sadaf snigdha Today lets talk about how women participation in the job sector has led to massive impacts in the job sector of Bangladesh. According to a research by The Asia Foundation its seen that from 1999/2000 to 2016/2017 the number of female workforce has...  moreToday lets talk about how women participation in the job sector has led to massive impacts in the job sector of Bangladesh. According to a research by The Asia Foundation its seen that from 1999/2000 to 2016/2017 the number of female workforce has increased from 8.6 million to 19.9 million which is more than twice & this is largely due to the increased literacy rate of women which stands at 71.95% & safety of women in job sector. The rise in women workforce is also due to Introduction of programmes like Microfinance from NGO’s like BRAC & others. Bangladesh also is the 2nd largest exporter of RMG & the workforce in this sector is largely made up of women. All these has lead to the rise of women involvement in job sector & this has lead to huge economic growth of the country.  less

    • July 15, 2021
  • 
    Zarin sadaf snigdha The GDP has seen extraordinary rises in the last few years & this is due to more of the population being involved in work & also women entrepreneurs have opened up the doors for others to earn. Women have also made home workstations such as product...  moreThe GDP has seen extraordinary rises in the last few years & this is due to more of the population being involved in work & also women entrepreneurs have opened up the doors for others to earn. Women have also made home workstations such as product selling online so they can work from home. As a result of all these the income per capita of the country has risen as the population becomes more productive. This led to the standard of life to go up hill where as poverty has gone downhill. As a result of all these the country has become more stable in terms of economy. In the end it must be said that undoubtedly rise of women in job sector has lead to huge impacts in our economy but we still have a long way to go, but till then নারীদের অধিকারে গাইব❤  less

    • July 15, 2021
• 
  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  The weird music of Sarah and Ali - $5 Physics quiz

  The weird music of Sarah and Ali - $5 Physics quiz
   
  
  Along with her musical team band, Sarah wants to become a famous and worldwide selling artist. She is incredibly passionate about musical instruments, particularly in the acoustic guitar. Aside...

  • July 13, 2021

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    Shadman Chowdhury When they were playing guitar, a loud thumping noise was produced due to the vibration of their playing, it caused some sort of interference. This would explain why when they are playing at the same time, there was an odd but clear sound that they were...  moreWhen they were playing guitar, a loud thumping noise was produced due to the vibration of their playing, it caused some sort of interference. This would explain why when they are playing at the same time, there was an odd but clear sound that they were not supposed to produce.
    
    The reason for this is because whenever any objects vibrate or moves, it produces interference. When one object moves in a particular direction or changes its motion suddenly, there will be waves forming in all directions. If another object has these waves hitting them as well while moving around by itself then there will be interference which will result in having waves being lost or changed.
    
    The concept of physics used is applied in the principle of interference. When two or more objects cause vibration or motion, there will be waves colliding with each other and either being canceled out or changed by a small fraction. This is an example of interference that can lead to many different problems down the road.  less

    • July 13, 2021
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    Zarin sadaf snigdha To answer this question we need to look at the principle of superposition of waves which states when 2 or more waves meet at a point the displacement or amplitude is equal to the vector summation of the amplitude of the individual waves. Here when they...  moreTo answer this question we need to look at the principle of superposition of waves which states when 2 or more waves meet at a point the displacement or amplitude is equal to the vector summation of the amplitude of the individual waves. Here when they both play the guitar simultaneously both of them produce waves of similar Frequency. These waves are produced interact with eachother & produce constructive & destructive superposition. This leads to amplitude at a few points to become double as displacement at that point is high. This leads to the loud noise as high amplitude is responsible for high sound. To avoid this they need to play different cords or change the frequency of the waves produced.  less

    • July 13, 2021
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    Tanveer Tausif Ratul The above phenomena is related to the terms-Interference and Superposition.When Sarah & Ali attempted to play
    the acoustic guitar synchronously,two sound waves were generated from two guiters at the exact same time.I mean each one produced the same...  moreThe above phenomena is related to the terms-Interference and Superposition.When Sarah & Ali attempted to play
    the acoustic guitar synchronously,two sound waves were generated from two guiters at the exact same time.I mean each one produced the same sound wave and both the waves were in same phase.Now,what is phase!
    
    
    If two waves have the same amplitude,same frequency and same wavelength,then it is said that both the waves are in same phase.
    
    
    So when two or more same-phased
    waves arrive at the same point (when both started playing their guitar),the waves superimpose themselves on one another.Actually the amplitudes of the wave superimpose.This term is known as-Superposition.So,the resultant wave will simply be the addition of the amplitudes of the individual waves.This superposition
    produces Constructive Interference which produces a wave that has twice the amplitude of the individual waves.The higher the amplitude,the louder the sound
    will be.
    
    
    On the other hand,it can be said very easily...    less

    • July 14, 2021
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    Tanveer Tausif Ratul that,when two waves are in opposite phase (their amplitude direction is opposite) & the superimpose on
    each other,the resulting amplitude is zero which is known as-Destructive Interference.It means the two waves cancel each other.Therefore,no sound will...  morethat,when two waves are in opposite phase (their amplitude direction is opposite) & the superimpose on
    each other,the resulting amplitude is zero which is known as-Destructive Interference.It means the two waves cancel each other.Therefore,no sound will be produced.
    
    From this discussion,it has been realized that when Sarah & Ali started playing at the same time,the sound waves generated from their instrument superimposed on each other and created the wave which had twice the amplitude of that individual wave.So a loud thumping noise was
    generated.But their ear were get used to it slowly.So,it didn’t affect that much later  less

    • July 14, 2021
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    Hasnain Tariq actually this happens due to resonance frequency . this is the frequency where superposition of waves can generate. same happen in the case of Sarah and Ali frequency of both musical instrument match suddenly this create loud thumping noise.

    • July 14, 2021
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  Zarin sadaf snigdha has added a new profile photo.

  

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  Zarin sadaf snigdha has added a new profile photo.

  

  • July 13, 2021
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  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  Andy Morales and The Rain - $5 Physics Quiz

  Andy Morales and the Rain - $5 Physics Quiz
   
  It's 6p.m, time to leave the railway station - Andy thought to himself, with a big sigh. Living a lonely life since the demise of his wife two years ago, everything to him seemed monotonous and tedious....

  • July 12, 2021

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    Syeda Anmol Andy used the ideology of moment. Moment of force is the idea to make a body to rotate on a pivot. Moment has a simple rule that is the closer you are to the pivot or the point the more energy you would require to rotate the body. This rule is obeyed by...  moreAndy used the ideology of moment. Moment of force is the idea to make a body to rotate on a pivot. Moment has a simple rule that is the closer you are to the pivot or the point the more energy you would require to rotate the body. This rule is obeyed by many objects which we use in our day-to-day life. Like a spanner handle is placed far from the pivot to rotate the nut or nail easier with less force. Similarly, in this case the pivot is the root of the tree, it is the turning point for the tree, when the crowd gathered they applied force very close to the pivot or the root this cause the tree not to budge but when Andy positioned the force on the far end from the pivot it made it easier for the crowd to move the tree. In simple, we can sum it up that the greater the distance the less the force needed and the smaller the distance the more force is needed which this scenario perfectly portrayed.  less

    • July 15, 2021
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    Nishat Tamanna Mr. Andy chimed in with the idea of momentum. Momentum is the product of force and the perpendicular distance between the pivot and line of force. He considered providing a force greater than the weight of the tree, but this is only feasible if the force...  moreMr. Andy chimed in with the idea of momentum. Momentum is the product of force and the perpendicular distance between the pivot and line of force. He considered providing a force greater than the weight of the tree, but this is only feasible if the force is delivered on the other side of the root.
    It is a fact that when a force is applied far from the pivot, the force is sufficient to elevate the other force/weight. Mr. Andy used that notion when assisting the individual.  

    • July 15, 2021
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    Farhan Shahid Andy's idea concerns the effect of moments. The idea about moments is that the further a force acts away from the pivot(the turning point of an object), the more effective it will be in turning the object. For example, the knob of a door is situated the...  moreAndy's idea concerns the effect of moments. The idea about moments is that the further a force acts away from the pivot(the turning point of an object), the more effective it will be in turning the object. For example, the knob of a door is situated the farthest from its pivot, the hinges. In the picture, we can see that the tree is tilted down towards the side of its roots. From this, we can guess that(counting the car as a pivot) there is a greater load acting downwards in that side of the tree, than the side with the leaves. The way the people were doing it before, they were wasting strength overcoming all the those forces and uprooting the tree. They were using the car as a pivot, and the distance between their force and the car/pivot was not much. However, pushing in an anticlockwise direction on the other side, with the leaves, shifts the pivot from being the car to being the roots, all the way on the other side of the tree. The pivot being far away, the forces proved effective.  less

    • July 15, 2021
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    Abdullah Masud Mr Andy was able to use the principles of moment in the above scenario. As mentioned in the scenario, the roots of the tree were fixed with the ground so it was a fixed point and a fixed point is called a pivot. This pivot allowed the tree to be removed...  moreMr Andy was able to use the principles of moment in the above scenario. As mentioned in the scenario, the roots of the tree were fixed with the ground so it was a fixed point and a fixed point is called a pivot. This pivot allowed the tree to be removed over the car. According to the principles of moment, the distance from the pivot to the point where the force is applied is directly proportional to the moment, meaning the longer this distance, the greater the rotation of the tree and that is why Mr Andy applied his force on the farther end of the tree so that with less force would produce greater moment due to the longer distance, away from the tree and was successful to remove it and save the passenger.  less

    • July 15, 2021
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    Shaikh Nafisa Binte Fahad Andy told others to help lift the tree from the other side, as the force acting away from the root of the tree made it easier to lift the tree than near the root.
    The car was acting as a pivot here because the weight of the whole tree was on the car. The...  moreAndy told others to help lift the tree from the other side, as the force acting away from the root of the tree made it easier to lift the tree than near the root.
    The car was acting as a pivot here because the weight of the whole tree was on the car. The bottom side of the tree was not uprooted, so it was heavier than the upper part, so more force was needed to lift it from near the roots. Therefore, it was easier to lift the tree upwards at a certain distance away from the root of the tree as there was less weight in the upper direction.
    Today, we learned about a great example in the field of physics. this topic can be identified as the 'moments'. Moments are directly proportional to the force and distance of a body, just like this one! Easy-Peasy!  less

    • July 16, 2021
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  Zarin sadaf snigdha commented on Fatima Ahmed's classified listing.

  

  Anwar's Different Perspective - $5 English Writing project

  Anwar's Different Perspective - $5 English writing project
   
  
   Anwar just completed the last level of his Mario Cart video game. Unlike all other students in his class, Anwar was an introvert and did not look like the typical 9th grade studen...

  • July 12, 2021

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    Sumaiya Amir 'LOSER', for me this term has a very deep meaning. This four letter word isn’t a comfortable thing in someone's life. You have to go through a series of depressions, complications and sleepless nights if this term ever get connected with you. Well,...  more'LOSER', for me this term has a very deep meaning. This four letter word isn’t a comfortable thing in someone's life. You have to go through a series of depressions, complications and sleepless nights if this term ever get connected with you. Well, like everyone else, I also have many situations in my life where I considered myself as a complete loser.You know being an introvert makes you disconnected from social life and it's not a joke. Being like that I was ditached from every success I could have achieved earlier. I was a shy person who could not even order a food for herself in any restaurant. I was someone who used to know the answers of most of the questions in school but always hesitated to talk. But you can not be like this forever right? In this century if you want to be successful, you have to talk and discuss. You have to share your opinions so that other persons can know your value. My university clubs did a great job to pull out the talents of me. They forced me to talk everyday and...    less

    • July 14, 2021
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    Sumaiya Amir share my opinions with everyone. After 3months of continuous practice, I was selected as an anchor of our varsity convocation program. A girl who could not even talk became an anchor? Yes that is right. I had my will to change the awkwardness inside me...  moreshare my opinions with everyone. After 3months of continuous practice, I was selected as an anchor of our varsity convocation program. A girl who could not even talk became an anchor? Yes that is right. I had my will to change the awkwardness inside me and I succeed. If you want something truly, you will achieve that no matter what. Just have patience. You will surely be a winner of that once you thought would be your loosing point.  

    • July 14, 2021
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    Nanjiba Naowar Personally I was an introvert and a bookworm. I love writing. But shyness never lets me publish it. People used to say I am unable to make others understand my thoughts. I was Bullied for it. Last year I felt depressed but didn't find anyone to share my...  morePersonally I was an introvert and a bookworm. I love writing. But shyness never lets me publish it. People used to say I am unable to make others understand my thoughts. I was Bullied for it. Last year I felt depressed but didn't find anyone to share my pain. So I expressed my thoughts and pain in words on my facebook timeline. Alhamdulillah, Not only it cures my heavy heart but also friends start liking my writings and give compliments. Then one day, a friend asked me to do an internship as a content writer. I had no idea about it. I googled, learned, did low paid writing jobs, sent CVs, gave interviews and got rejected many times. Every time I fail I learn something new from my mistakes. Before the year ends, alhamdulillah, I have 2 paid freelancing writing works, one internship. Even i won a physics quiz of coolinventors though I have been a business student from the very beginning. I have many 'loser to successful' stories, but 'how an introvert girl becomes successful in sharing her thoughts' is...    less

    • July 14, 2021
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    Raju Loodh It was my college days story. That time I was not so good at English even I did not know how to write in proper way. We had an English Named ala Uddin. Every day while he come to class he used to tell. Just write something in English. It does not matter...  moreIt was my college days story. That time I was not so good at English even I did not know how to write in proper way. We had an English Named ala Uddin. Every day while he come to class he used to tell. Just write something in English. It does not matter how much mistakes you do. I will not give you punishment if you do any mistake but i will punish you if you don't write. Everyday i used write something in English. At begging i did many mistakes and he solved those mistakes and motivated me. Gradually, i started improving my English and at last I got chance one of the best public university in Bangladesh just because of my English. It was my college days story. At that time I was not so good at English even I did not know how to write properly. We had an English teacher Named ala Uddin. Every day he used to tell. Just write something in English. It does not matter how many mistakes you do but you have to write. I will not give you punishment if you do any mistakes but I will punish you if you don't...    less

    • July 15, 2021
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    Shaikh Nafisa Binte Fahad The famous world-class boys of the BTS band also took part in their fight and it was heartbreaking to hear their story. The boys were about to give up and almost lost hope. But they stood together and today their fight has led to a worldwide reputation...  moreThe famous world-class boys of the BTS band also took part in their fight and it was heartbreaking to hear their story. The boys were about to give up and almost lost hope. But they stood together and today their fight has led to a worldwide reputation as one of the best and most well-known K-pop bands in the world.
    Taehyung was a son of a farmer; RM's mom used to pressure him about his studies, career; Suga, who loved music but his family always burnt all his hard work as they wanted him to focus on his studies.
    The band has almost spread out because they don’t have enough money to continue, no funds, so a few members had to choose between food and transportation and do two things. Behind their confident presence, they were constantly battling self-doubt and frustration. In fact, there is a difference even if everyone loses. "The real losers in life are not those who try and fail, but those who fail to try."  less

    • July 16, 2021
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  Zarin sadaf snigdha is now friends with Fatima Ahmed.

  • July 9, 2021
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  Zarin sadaf snigdha has just signed up. Say hello!

  • July 7, 2021