Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 23, Problem 5PLA
A heated piece of metal at a temperature T1 is placed into a calorimeter containing water and a stirrer. The temperature of the calorimeter, water, and stirrer is initially T2, where T1 > T2. The system is stirred continuously until it comes to equilibrium at a temperature of T3.
What is the purpose of stirring the system continuously?
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Imagine you are out for a stroll on a sunny day when you encounter a lake. Unpolarized light from the sun is reflected off the lake into your eyes. However, you notice when you put on your vertically polarized sunglasses, the light reflected off the lake no longer reaches your eyes. What is the angle between the unpolarized light and the surface of the water, in degrees, measured from the horizontal? You may assume the index of refraction of air is nair=1 and the index of refraction of water is nwater=1.33 . Round your answer to three significant figures. Just enter the number, nothing else.
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Physics Laboratory Manual
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