Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 25, Problem 81RCQ
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1.56 ⚫. Three horizontal ropes pull on a large stone stuck in the
ground, producing the vector forces A, B, and C shown in Fig. P1.56.
Find the magnitude and direction of a fourth force on the stone that will
make the vector sum of the four forces zero.
Figure P1.56
B(80.0 N)
30.0
A (100.0 N)
53.0°
C (40.0 N)
30.0°
1.39 Given two vectors A = -2.00 +3.00 +4.00 and
B=3.00 +1.00 -3.00k. (a) find the magnitude of each vector;
(b) use unit vectors to write an expression for the vector difference
A - B; and (c) find the magnitude of the vector difference A - B. Is
this the same as the magnitude of B - Ä? Explain.
5. The radius of a circle is 5.5 cm.
(a) What is the circumference in meters?
(b) What is its area in square meters?
6. Using the generic triangle below, solve the following:
0 = 55 and c = 32 m, solve for a and b.
a = 250 m and b = 180 m, solve for the angle and c.
b=104 cm and c = 65 cm, solve for a and the angle
b
a
7. Consider the figure below representing the Temperature (T in degrees Celsius) as a function of time
t (in seconds)
4
12
20
(a) What is the area under the curve in the figure below?
(b) The area under the graph can be calculated using integrals or derivatives?
(c) During what interval is the derivative of temperature with respect to time equal to zero?
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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