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प्रश्न
Complete the following sentence :
Pressure at a point inside the liquid is ...................... To its depth.
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उत्तर
Pressure at a point inside the liquid is directly proportional To its depth.
संबंधित प्रश्न
What is upthrust ?
Define buoyant force. Name two factors on which buoyant force depends.
Why does a piece of ice float on water?
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
How does the pressure exerted by a solid and fluid differ?
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.
A hammer exerts a force of 1.5 N on each of the two nails A and B. The area of cross section of tip of nail A is 2 mm2 while that of nail B is 6 mm2. Calculate pressure on each nail in pascal.
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
A homogeneous block floats on water (a) partly immersed (b) completely immersed. In each case state the position of centre of buoyancy B with respect to the centre of gravity G of the block.
Write about buoyant force.
