A high-speed swimmer uses 120,000 � of energy in a half-minute race. Three quarters of the energy iswasted through heat flow; the rest is dissipated by his hands and legs, by mechanical work.a. In 30 �, he swims 50 �. Estimate the average force opposing his motion.b. Describe the changes of form of energy in the swimming.c. Where and in what form is the energy that had been released when he has finished therace
A high-speed swimmer uses 120,000 � of energy in a half-minute race. Three quarters of the energy iswasted through heat flow; the rest is dissipated by his hands and legs, by mechanical work.a. In 30 �, he swims 50 �. Estimate the average force opposing his motion.b. Describe the changes of form of energy in the swimming.c. Where and in what form is the energy that had been released when he has finished therace
College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter11: Energy In Thermal Processes
Section: Chapter Questions
Problem 6P
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A high-speed swimmer uses 120,000 � of energy in a half-minute race. Three quarters of the energy is
wasted through heat flow; the rest is dissipated by his hands and legs, by mechanical work.
a. In 30 �, he swims 50 �. Estimate the average force opposing his motion.
b. Describe the changes of form of energy in the swimming.
c. Where and in what form is the energy that had been released when he has finished the
race
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