Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 25, Problem 39RCQ
To determine
That the primary coil has five times the turns than the secondary.
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43. A mass må undergoes circular
motion of radius R on a hori-
zontal frictionless table, con-
nected by a massless string
through a hole in the table to
a second mass m² (Fig. 5.33).
If m₂ is stationary, find expres-
sions for (a) the string tension
and (b) the period of the circu-
lar motion.
m2
R
m₁
FIGURE 5.33 Problem 43
CH
70. A block is projected up an incline at angle 0. It returns to its initial
position with half its initial speed. Show that the coefficient of ki-
netic friction is μk = tano.
Passage Problems
A spiral is an ice-skating position in which the skater glides on one
foot with the other foot held above hip level. It's a required element
in women's singles figure-skating competition and is related to the
arabesque performed in ballet. Figure 5.40 shows Canadian skater
Kaetlyn Osmond executing a spiral during her medal-winning perfor-
mance at the 2018 Winter Olympics in Gangneung, South Korea.
77. From the photo, you can conclude
that the skater is
a. executing a turn to her left.
b. executing a turn to her right.
c. moving in a straight line out of
the page.
78. The net force on the skater
a. points to her left.
b. points to her right.
c. is zero.
79. If the skater were to execute the same
maneuver but at higher speed, the tilt
evident in the photo would be
a. less.
b. greater.
c. unchanged.
FIGURE 5.40 Passage
Problems 77-80
80. The tilt angle 0 that the skater's body
makes with the vertical is given ap-
proximately by 0 = tan¯¹(0.5). From this you can conclude…
Chapter 25 Solutions
Conceptual Physics (12th Edition)
Ch. 25 - Prob. 1RCQCh. 25 - What must change in order for electromagnetic...Ch. 25 - State Faraday’s law.Ch. 25 - What are the three ways in which voltage can be...Ch. 25 - How does the frequency of induced voltage relate...Ch. 25 - What are the basic differences and similarities...Ch. 25 - Prob. 7RCQCh. 25 - Prob. 8RCQCh. 25 - Prob. 9RCQCh. 25 - Prob. 10RCQ
Ch. 25 - What commonly supplies the energy input to a...Ch. 25 - Prob. 12RCQCh. 25 - Prob. 13RCQCh. 25 - Prob. 14RCQCh. 25 - Prob. 15RCQCh. 25 - Prob. 16RCQCh. 25 - Prob. 17RCQCh. 25 - Prob. 18RCQCh. 25 - Prob. 19RCQCh. 25 - In a step-down transformer, how does the input...Ch. 25 - Prob. 21RCQCh. 25 - Prob. 22RCQCh. 25 - When the magnetic field changes in a coil of wire,...Ch. 25 - Prob. 24RCQCh. 25 - Prob. 25RCQCh. 25 - Prob. 26RCQCh. 25 - What is induced by the rapid alternation of a...Ch. 25 - What is induced by the rapid alternation of an...Ch. 25 - Prob. 29RCQCh. 25 - Prob. 30RCQCh. 25 - Prob. 31RCQCh. 25 - Prob. 32RCQCh. 25 - Prob. 33RCQCh. 25 - Prob. 34RCQCh. 25 - 35. The primary of a transformer connected to 120...Ch. 25 - 36. The primary of a transformer connected to 120...Ch. 25 - Prob. 37RCQCh. 25 - 38. A model electric train requires 6 V to...Ch. 25 - Prob. 39RCQCh. 25 - Prob. 40RCQCh. 25 - Prob. 41RCQCh. 25 - 42. An ideal transformer has 50 turns in its...Ch. 25 - Prob. 43RCQCh. 25 - 44. A power of 100 kW (105 W) is delivered to the...Ch. 25 - 45. Bar magnets are moved into the wire coils in...Ch. 25 - 46. Each of the transformers shown is powered with...Ch. 25 - Prob. 47RCQCh. 25 - Prob. 48RCQCh. 25 - Prob. 49RCQCh. 25 - Prob. 50RCQCh. 25 - Prob. 51RCQCh. 25 - 52. Why does a motor also tend to act as a...Ch. 25 - Prob. 53RCQCh. 25 - Prob. 54RCQCh. 25 - Prob. 55RCQCh. 25 - Prob. 56RCQCh. 25 - Prob. 57RCQCh. 25 - 58. When you turn the shaft of an electric motor...Ch. 25 - Prob. 59RCQCh. 25 - Does the voltage output increase when a generator...Ch. 25 - Prob. 61RCQCh. 25 - Prob. 62RCQCh. 25 - Prob. 63RCQCh. 25 - 64. How could a lightbulb near an electromagnet,...Ch. 25 - 65. A length of wire is bent into a closed loop...Ch. 25 - 66. Two separate but similar coils of wire are...Ch. 25 - Prob. 67RCQCh. 25 - Prob. 68RCQCh. 25 - Prob. 69RCQCh. 25 - Prob. 70RCQCh. 25 - Prob. 71RCQCh. 25 - Prob. 72RCQCh. 25 - Prob. 73RCQCh. 25 - Prob. 74RCQCh. 25 - Prob. 75RCQCh. 25 - 76. A 120-V ac source powers the circuit shown....Ch. 25 - 77. In the circuit shown, how many volts are...Ch. 25 - Prob. 78RCQCh. 25 - Prob. 79RCQCh. 25 - Prob. 80RCQCh. 25 - Prob. 81RCQCh. 25 - Prob. 82RCQCh. 25 - Prob. 83RCQCh. 25 - 84. How do you suppose the frequency of an...Ch. 25 - Prob. 85RCQCh. 25 - Prob. 86RCQCh. 25 - Prob. 87RCQCh. 25 - Prob. 88RCQCh. 25 - Prob. 89RCQCh. 25 - 90. Your friend says that according to Ohm’s law,...Ch. 25 - Prob. 91RCQCh. 25 - Prob. 92RCQCh. 25 - Prob. 93RCQCh. 25 - 94. A metal bar, pivoted at one end, oscillates...Ch. 25 - Prob. 95RCQCh. 25 - Prob. 96RCQ
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