A student heats three objects to the same uniform temperature and suspends them in…
PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A student heats three objects to the same uniform temperature and suspends them in still air:
1. a thin copper wire of length 1 m and diameter 1 mm
2. a solid copper cylinder of length 1 m and diameter 1 cm
3. a solid copper sphere whose mass equals that of the wire
Rank the objects from fastest to slowest rate of cooling during the first few seconds after they are placed in air. Justify your ranking based on relevant physical characteristics.