Question

1. scenario: you place an ice cube in a cup of hot tea. describe what happens to the temperatures of the ice cube and tea over time.
2. multiple choice: when two substances reach the same temperature, they are said to be in:

a) conduction
b) radiation
c) thermal equilibrium
d) convection

1. short answer: why does a cold soda can eventually feel warm when left out in a room?
2. scenario: a hot metal rod is placed in a bucket of cold water. predict what will happen to the temperature of the rod and the water after several minutes.
3. multiple choice: which statement best describes thermal equilibrium?

a) heat transfer stops once both objects reach the same temperature.
b) heat always flows forever.
c) heat moves randomly between objects.
d) heat only moves in solids.

Explanation:

8.

Heat transfers from hot tea (higher - temperature substance) to ice cube (lower - temperature substance). Ice cube absorbs heat, its temperature rises (and it may melt). Tea loses heat, its temperature drops. Eventually, they reach thermal equilibrium (same temperature).

Conduction, radiation, and convection are heat - transfer mechanisms. Thermal equilibrium is the state when two substances have the same temperature.

Heat transfer occurs from the warmer room (higher - temperature environment) to the colder soda can (lower - temperature object) until thermal equilibrium (same temperature) is reached.

Answer:

The temperature of the ice cube increases (and it may melt), and the temperature of the tea decreases. Eventually, they reach the same temperature.

9.