Physics Technology Update (4th Edition)

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

Chapter 29 - Relativity - Problems and Conceptual Exercises - Page 1044: 77

Answer

Greater than

Work Step by Step

We know that $E=mc^2$. This equation shows that the mass and energy are directly proportional to each other. The warm cup of tea has more energy than the same cup of tea that has been cooled. Thus, we conclude that the mass of the warm cup of tea is greater than the mass of the same cup of tea when it has cooled.
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