Question

2 heat will continue to transfer between two areas or objects until
a. both areas/objects are the same temperature b. the melting point is reached
c. all heat energy is lost to the air d. the colder object absorbs all of the heat energy
3 which of the following is an example of conduction?
a. solar energy warming a room b. heat rising from the coils of a stove
c. hot air drying wet towel d. heat moving from warm sand to your feet at the bea

Explanation:

• For question 2: According to the principle of heat transfer, heat transfer stops when thermal equilibrium (same temperature) is achieved. Option a is correct as heat transfer continues until thermal equilibrium (same temperature). Option b is about a phase - change property (melting point), not heat - transfer stopping condition. Option c is incorrect as heat transfer is between two objects/areas, not necessarily to the air. Option d is wrong because heat transfer stops at thermal equilibrium, not when one absorbs all heat.
• For question 3: Conduction is heat transfer through direct contact. Option d (heat from sand to feet via contact) is conduction. Option a is radiation (solar energy). Option b is convection (hot air rising). Option c is also related to convection (hot air drying).

Answer:

1. a. both areas/objects are the same temperature
2. d. heat moving from warm sand to your feet at the beach