Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 20, Problem 57P
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In an experiment, the temperature of a hot gas stream is to be measured by a thermocouple with a spherical junction. Due to the nature of this experiment, the response time of the thermocouple to register 99 percent of the initial temperature difference must be within 5 s. The properties of the thermocouple junction are k = 35 W/m·K, r = 8500 kg/m3, and cp = 320 J/kg·K. If the heat transfer coefficient between the thermocouple junction and the gas is 250 W/m2·K, determine the diameter of the junction.
An interstate highway is made of concrete slabs 25 m long placed end to end. (a) Whatexpansion gap must be left between the slabs to prevent buckling when the temperaturechanges from 20 oC to 50 oC? (b) Starting with the gap calculated in part (a), find the gapwhen the temperature decreases to -20 oC.
A 1.00 mol sample of an ideal diatomic gas, originally at 1.00 atm and 20 oC, expands adiabatically to 1.75 times its initial volume. What are the final pressure and temperature for the gas? ( Assume no molecular vibration)
Chapter 20 Solutions
Physics for Scientists and Engineers
Ch. 20 - Prob. 1PCh. 20 - Prob. 2PCh. 20 - Prob. 3PCh. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
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