College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Chapter 11, Problem 12P
A 1.5-kg copper block is given an initial speed of 3.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature. (b) What happens to the remaining energy?
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A 1.5-kg copper block is given an initial speed of 3.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature. (b) What happens to the remaining energy?
A 1.4-kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature.
A person inhales and exhales 2.00 L of 37.0ºC air, evaporating 4.00×10−2 g of water from the lungs and breathing passages with each breath. (a) How much heat transfer occurs due to evaporation in each breath?(b) What is the rate of heat transfer in watts if the person is breathing at a moderate rate of 18.0 breaths per minute?(c) If the inhaled air had a temperature of 20.0ºC , what is the rate of heat transfer for warming the air?(d) Discuss the total rate of heat transfer as it relates to typical metabolic rates. Will this breathing be a major form of heat transfer for this person?
Chapter 11 Solutions
College Physics
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