Question

An iron ball at 40°C is dropped in a mug containing water at 40°C.The heat will(a) flow from iron ball to water.(b) not flow from iron ball to water or from water to iron ball.(c) flow from water to iron ball.(d) increase the temperature of both.
Topic: Heat

Answer 1

Answer:

An Iron ball at 40 °C is dropped in a mug containing water at 40 °C. The heat will not flow from iron ball to water or from water to iron ball.

Explanation:

• When a hot body is kept in contact with a cold body, it is noticed that after sometime, the hot body becomes less or and the cold body becomes less cold.
• Obviously, this is because of the flow of heat from hot body to the cold body.
• The body which imparts heat is said to be at a higher temperature than the body which receives heat.
• Thus, temperature determines the direction of flow of heat.
• When a body reserves heat energy, the particles constituting the body start vibrating more vigorously and its temperature rises provided its physical state or dimensions remained unchanged.
• If there is no transfer of heat between the two body placed in contact, they are said to be at the same temperature.
• But it does not mean that they have equal amount of heat in them.
• In fact, Temperature alone does not tell us the quantity of heat energy contained in a body.
• Experimentally, we find that by important same quantity of heat energy to different bodies, they get heated to different temperatures.
• The amount of heat energy contained by a body depends on its mass, temperature and the nature of material of the body.

Answer 2

When an iron ball at 40 degree celsius is dropped in a mug containing water at 40 degree celsius, the heat will not flow from iron ball to water or from water to iron ball. It is because of the fact that both the substance the water and the iron have the same temperature.