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प्रश्न
Consider the statement given below and choose the correct option.
Assertion: Water strider slides easily on the surface of the water.
Reason: Water strider experiences less buoyant force.
विकल्प
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true, but reason is not the correct explanation of assertion.
Assertion is true, but reason is false.
Both assertion and reason are false.
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उत्तर
If both assertion and reason are true, but reason is not the correct explanation of assertion
Correct explanation:
It is due to the surface tension of water.
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संबंधित प्रश्न
Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
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The S.I. unit of density is ..........
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The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.

- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
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Why is a force needed to keep a block of wood inside water?
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
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Mass = .................... × density
Higher Order Thinking Skill.
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