2nd Edition

ISBN: 9781711470832

Author: OpenStax

Publisher: XANEDU

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Chapter 20, Problem 71PE

Construct Your Own Problem

Consider an electric immersion heater used to heat a cup of water to make tea. Construct a problem in which you calculate the needed resistance of the heater so that it increases the temperature of the water and cup in a reasonable amount of time. Also calculate the cost of the electrical energy used in your process. Among the things to be considered are the voltage used_, the masses and heat capacities involved, heat losses, and the time over which the heating takes place. Your instructor may wish for you to consider a thermal safety switch (perhaps bimetallic) that will halt the process before damaging temperatures are reached in the immersion unit.

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Chapter 20, Problem 70PE

Chapter 20, Problem 72PE

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Chapter 20 Solutions

COLLEGE PHYSICS

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