Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 28, Problem 29RCQ
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If the metal sphere on the Van de Graff has a charge of 0.14 Coulombs and the person has a mass of 62 kg, how much excess charge would the person need in order to levitate at a distance 25 cm from the center of the charged metal sphere? Assume you can treat both the person and the metal sphere as point charges a distance 25 cm from each other (so that you can use Coulomb's Law to calculate the electrical force).
Using Coulomb's Law, calculate the magnitude of the electrical force between two protons located 1 meter apart from each other. (Give your answer as the number of Newtons but as usual you only need to include the number, not the unit label.)
Part A
You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You
estimate that a transmission wire is about 12 m above the ground. The local power company tells you that
the line operates at 12 kV and provide a maximum of 60 MW to the local area.
Estimate the maximum magnetic field you might experience walking under such a power line, and compare to the Earth's field. [For an ac current, values are rms, and the magnetic field will be changing.]
Express your answer using two significant figures.
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Part B
Compare to the Earth's field of 5.0 x 10-5 T.
Express your answer using two significant figures.
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Chapter 28 Solutions
Conceptual Physics (12th Edition)
Ch. 28 - Prob. 1RCQCh. 28 - Prob. 2RCQCh. 28 - Prob. 3RCQCh. 28 - Prob. 4RCQCh. 28 - Prob. 5RCQCh. 28 - Prob. 6RCQCh. 28 - Prob. 7RCQCh. 28 - Prob. 8RCQCh. 28 - Prob. 9RCQCh. 28 - Prob. 10RCQ
Ch. 28 - Prob. 11RCQCh. 28 - Prob. 12RCQCh. 28 - Prob. 13RCQCh. 28 - Prob. 14RCQCh. 28 - Prob. 15RCQCh. 28 - Prob. 16RCQCh. 28 - Prob. 17RCQCh. 28 - Prob. 18RCQCh. 28 - Prob. 19RCQCh. 28 - Prob. 20RCQCh. 28 - Prob. 21RCQCh. 28 - Prob. 22RCQCh. 28 - Prob. 23RCQCh. 28 - Prob. 24RCQCh. 28 - Prob. 25RCQCh. 28 - Prob. 26RCQCh. 28 - Prob. 27RCQCh. 28 - Prob. 28RCQCh. 28 - Prob. 29RCQCh. 28 - Prob. 30RCQCh. 28 - Prob. 31RCQCh. 28 - Prob. 32RCQCh. 28 - Prob. 33RCQCh. 28 - Prob. 34RCQCh. 28 - Prob. 35RCQCh. 28 - Prob. 36RCQCh. 28 - Prob. 37RCQCh. 28 - Prob. 38RCQCh. 28 - Prob. 39RCQCh. 28 - Prob. 40RCQCh. 28 - No glass is perfectly transparent. Mainly because...Ch. 28 - Prob. 42RCQCh. 28 - Prob. 43RCQCh. 28 - Prob. 44RCQCh. 28 - Prob. 45RCQCh. 28 - Prob. 46RCQCh. 28 - Prob. 47RCQCh. 28 - Prob. 48RCQCh. 28 - Prob. 49RCQCh. 28 - Prob. 50RCQCh. 28 - Prob. 51RCQCh. 28 - Prob. 52RCQCh. 28 - Prob. 53RCQCh. 28 - Prob. 54RCQCh. 28 - Prob. 55RCQCh. 28 - Prob. 56RCQCh. 28 - Prob. 57RCQCh. 28 - Prob. 58RCQCh. 28 - Prob. 59RCQCh. 28 - What must be the minimum length of a plane mirror...Ch. 28 - Prob. 61RCQCh. 28 - Prob. 62RCQCh. 28 - Prob. 63RCQCh. 28 - Prob. 64RCQCh. 28 - Prob. 65RCQCh. 28 - Prob. 66RCQCh. 28 - Prob. 67RCQCh. 28 - Prob. 68RCQCh. 28 - Prob. 69RCQCh. 28 - Prob. 70RCQCh. 28 - Prob. 71RCQCh. 28 - Prob. 72RCQCh. 28 - Prob. 73RCQCh. 28 - Prob. 74RCQCh. 28 - Prob. 75RCQCh. 28 - Prob. 76RCQCh. 28 - Prob. 77RCQCh. 28 - Prob. 78RCQCh. 28 - Prob. 79RCQCh. 28 - Prob. 80RCQCh. 28 - Prob. 81RCQCh. 28 - Prob. 82RCQCh. 28 - Prob. 83RCQCh. 28 - Prob. 84RCQCh. 28 - Prob. 85RCQCh. 28 - Prob. 86RCQCh. 28 - Prob. 87RCQCh. 28 - Prob. 88RCQCh. 28 - Prob. 89RCQCh. 28 - Prob. 90RCQCh. 28 - Prob. 91RCQCh. 28 - Prob. 92RCQCh. 28 - Prob. 93RCQCh. 28 - Prob. 94RCQCh. 28 - Prob. 95RCQCh. 28 - Prob. 96RCQCh. 28 - Prob. 97RCQCh. 28 - Prob. 98RCQCh. 28 - Prob. 99RCQCh. 28 - Prob. 100RCQCh. 28 - Prob. 101RCQCh. 28 - Rays of light moving upward through water toward...Ch. 28 - Prob. 103RCQCh. 28 - Prob. 104RCQCh. 28 - Prob. 105RCQCh. 28 - Prob. 106RCQCh. 28 - Prob. 107RCQCh. 28 - Prob. 108RCQCh. 28 - Prob. 109RCQCh. 28 - Prob. 110RCQCh. 28 - Prob. 111RCQ
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- 64. Two springs have the same unstretched length but different spring constants, k₁ and k₂. (a) If they're connected side by side and stretched a distance x, as shown in Fig. 4.24a, show that the force exerted by the combination is (k₁ + k₂)x. (b) If they're con- nected end to end (Fig. 4.24b) and the combination is stretched a distance x, show that they exert a force k₁k2x/(k₁ + k₂). www (a) FIGURE 4.24 Problem 65 www (b)arrow_forward65. Although we usually write Newton's second law for one-dimensional motion in the form F =ma, which holds when mass is constant, d(mv) a more fundamental version is F = . Consider an object dt whose mass is changing, and use the product rule for derivatives to show that Newton's law then takes the form F dm = ma + v dtarrow_forwardIf a proton is located on the x-axis in some coordinate system at x0 = -3.2 x 10-5 meters, what is the x-component of the Electric Field due to this proton at a position x = +3.2 x 10-5 meters and on the x axis as the y-axis is 0 giving a number of Newtons/Coulomb?arrow_forward
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