A liquid drop of Diameter 'D' breaks up into 27 tiny drops. Find the resulting change in energy.

Give example of a situation in which an applied force does not result in a change in kinetic energy.

Mangal's room heater is marked as 1,000 W -200 V. Find the percentage change in the power of the heater, if the voltage drops to 160 V.

If a drop of liquid breaks into smaller droplets, it results in lowering of temperature of the dorplets. Let a drop f radius R,break into N small droplets each of radius r. Estimate the dorp in temperature.

Small liquid drops assume spherical shape because

A measuring jar of internal diameter 10 cm is partially filled with water. Four equal spherical balls of diameter 2 cm each is dropped in it and they sink down in water completely. What will be the change in the level of water in the jar?