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प्रश्न
A mug full of water appears light as long as it is under water in the bucket than when it is outside water. Why ?
उत्तर
In a bucket, a mug full of water appears lighter when it is under water than when it is outside the water because water exerts an upward force on the object immersed in it. Thus, the upward force acting on an object immersed in a liquid results in an apparent loss of weight, making the object to float on its surface. This upward force is called buoyant force or upthrust.
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संबंधित प्रश्न
The volume of 50 g of a substance is 20 cm3. If the density of water is 1 g cm−3, will the substance float or sink?
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What is the density of water in SI units ?
What is the value of relative density of water ?
Fill in the blank with suitable word :
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Steel sinks in water but a steel boat floats. Why ?
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Consider the following information in respect of four objects A, B, C and D :
| Object | Density(kg/m3) | Volume(m3) | Mass(kg) |
| A | 2 | 4000 | |
| B | 8000 | 4 | |
| C | 2000 | 1000 | |
| D | 4 | 2000 |
Which object would float on water ?
Choose the odd one:
