1One syringe holds water and the other holds air, and both nozzles are closed. The piston of which syringe can be pushed in?
2When the piston of the air-filled syringe is pushed in, did it show the same effect as in the water-filled syringe?
3When a polythene bag full of water is squeezed from the top, does the water come out from all the holes uniformly?
4Define thrust and pressure, and give the SI unit of each.
5A box of weight 600 N rests on the floor over an area of 1.5 m². Find the pressure it exerts on the floor.
6Why is pressure transmitted through a liquid but not through a solid?
7Why does toothpaste come out of the mouth of the tube when the tube is squeezed near its bottom?
8Why must a gas be compressed before it can transmit pressure as a liquid does?
9A hydrogen balloon rises when released. Why does it stop rising and float at a certain height?
10State Pascal's law and describe how it is verified with a vessel fitted with four pistons.
11Why does the card over the mouth of an upturned glass full of water not fall?
12Name three machines that are based on Pascal's law.