NCERT Question 9 - Chapter 4 Class 7 - Heat

An iron ball at 40°C is dropped in a mug containing water at 40°C.

The heat will

1. flow from iron ball to water.
2. not flow from iron ball to water or from water to iron ball.
3. flow from water to iron ball.
4. increase the temperature of both

Answer:

• Heat flows from objects at higher temperatures to objects at lower temperatures .
• Since both the substances are at the same temperature there will be no net flow of heat

So, the correct answer is, (b) not flow from iron ball to water or from water to iron ball.