An astronaut has two objects that are identical in all respects, except that one

Question

An astronaut has two objects that are identical in all respects, except that one is painted black and the other is painted silver. Initially, they are at the same temperature. When taken from inside the Space Shuttle and placed in outer space, which object, if either, cools down at a faster rate? The object painted black Both objects cool down at the same rate. The object painted silver It is not possible to determine which object cools down at the faster rate.

The object painted blackBoth objects cool down at the same rate.The object painted silverIt is not possible to determine which object cools down at the faster rate.

Explanation / Answer

The rate of heat radiated is directly proportional to the emissivity of the object that is radiating. A black painted object will most likely have a much higher emissivity than a silver painted object. Therefore the black object will cool down faster.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.