Which of the following phenomena is not due to high specific heat of water?

1. Water is used as coolant
2. For fomentation hot water bottles are used.
3. Water is used in cold countries as heat reservoir of wine and juice bottles.
4. None of the above

Lead is not used in calorimeter because

1. it has high specific heat
2. it is not a metal
3. it is a toxic metal
4. it is not a solid metal

(a) A body of mass 5.5 kg is dropped from the 2nd floor of a building which is at a height of 15 m. What is the force acting on it during its fall? (g = 10 ms^-2)

(b) What are isobars ?

(c) How many pulleys are there in a movable block and tackle system with velocity ratio 5 ?

(a) Give one example of pure rotational motion.

(b) Comment on the movement of particles on the axis of rotation in pure rotational motion.