1. Give two important effects of heat.
Answers
Answer:
Expansion: When heat is added to any substance, the particles gain energy and vibrates(with more speed) or vigorously about their fixed positions, forcing each other further apart.
Increase in temperature: When heated there is increase in kinetic energy and particles move at higher speed.
Step-by-step explanation:
1. Increases Volume
Illustration:- The rails on a railway line are laid with a small gap between them so that with a rise in temperature in summer the gap would provide room for expansion. Heat will also be generated when the train passes over the rails.
2. Changes State
Illustration :- The iron tyre of a cart wheel is always made a bit smaller in diameter than the wooden wheel. After making the tyre red hot, it is slipped on the wheel, and water is poured on it. On cooling the iron tyre contracts, and holds the parts firmly together.