1.Will the pressure excited by water on a diver at a certain depth in the ocean, be different than in the river? If yes, explain how.
2. Why does a girl on a pair of skis not sink into soft snow?
3.A gas bubble released at the bottom of a lake grows in size as it rises to the surface of a lake. Explain it.
4. Why is the blood pressure in humans greater at the feet than at the brain?
5. Why is a force needed to keep a piece of cork inside the water?
6.1 State the principle of working of an altimeter.
6.2 How is barometric height altered when a drop of water is introduced in a Mercury barometer tube?
7.why is the barometric pressure expressed in terms of length of Mercury column instead of in pascals?
8.1 A cargo ship is loaded in sea water to maximum capacity. What will happen if the ship is moved to river water? Give a reason for your answer.
8.2 A body of mass 100 g is floating in water. What will be its apparent weight? Justify your answer.
9. Why does an egg sink in freshwater but floats in a strong solution of salt?
10.1 what do you mean by the pressure exerted by a liquid? How does it differ from the pressure exerted by a solid?
10.2 Calculate the length of the water column, if water is used as a barometric liquid.
Thank you Sir
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