Modern Physics
Modern Physics
3rd Edition
ISBN: 9781111794378
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Chapter 2, Problem 4Q
To determine

That the mass of a compressed spring is greater than the mass of the same spring when it is not compressed.

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The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. By measuring the amount of energy we receive from the sun, we know that it is producing energy at a rate of 3.8 * 1026 W. (a) How many kilograms of matter does the sun lose each second? Approximately how many tons of matter is this (1 ton = 2000 lb)? (b) At this rate, how long would it take the sun to use up all its mass?
The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. By measuring the amount of energy we receive from the sun, we know that it is producing energy at a rate of 3.8 x 1026 W. (a) How many kilograms of matter does the sun lose each second? Approximately how many tons of matter is this (1 ton = 2000 lb)? (b) At this rate, how long would it take the sun to use up all its mass?
Uranium-238 decays via the alpha decay process.  Part (a)  Calculate the energy released in units of megaelectron volts when a uranium-238 nucleus undergoes alpha decay.  Part (b)  What fraction of the mass of a single uranium-238 nucleus is destroyed in the decay?  Part (c)  Why is difficult to observe the change in mass for a macroscopic sample of uranium-238?

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