Modern Physics, 3rd Edition
Modern Physics, 3rd Edition
3rd Edition
ISBN: 9780534493394
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Chapter 14, Problem 1Q
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Explain the functions of moderator and control rod in fission reactor.

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Answer to Problem 1Q

Moderators slows down the neutrons formed during fission, and control rods absorb the excess neutrons to control the fission rate

Explanation of Solution

In a nuclear reactor moderators are used to control the speed of the neutrons produced as the end product of fission. Moderators will slow the fast moving neutrons. Commonly used moderators are water, solid graphite, heavy water etc.

Control rods are used to control the fission rate of uranium and plutonium. Control rods are made up of elements like carbon, boron, cadmium, silver which are capable of absorbing neutrons, and hence controls the fission rate.

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a 500-n block is dragged along a horizontal surface by an applied force t at an angle of 30.0° (see figure). the coefficient of kinetic friction is uk = 0.400 and the block moves at a constant velocity. what is the magnitude of the applied force T in newtons?
a 500-n block is dragged along a horizontal surface by an applied force t at an angle of 30.0° (see figure). the coefficient of kinetic friction is uk = 0.400 and the block moves at a constant velocity. what is the magnitude of the applied force T in newtons?
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