Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 16 - Temperature and Heat - Problems and Conceptual Exercises - Page 569: 66

Answer

The rate of cooling of mug 1 is less than that of mug 2.

Work Step by Step

We know that the thermal radiation is directly proportional to the surface area. Mug 2, which is half filled, has a greater surface area and thus its temperature decreases more rapidly as compared to that of mug 1. Thus, the rate of cooling of mug 1 is less than that of mug 2.
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