Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 9, Problem 55RCQ
To determine
The relationship between force and distance in an inverse -square law.
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For items 8-9, refer to the problem below.
Find all the currents flowing in every resistor, power dissipation in
every resistor and the total power of the circuit shown at the right
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9. Maxwell's Mesh Analysis (5 pts)
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Nature of Resistance
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Ohm's Law, Energy and Power
Kirchhoff's Law
• Maxwell's Mesh Analysis
1. A coil of copper wire (p = 10.37 2-cmil/ft) has a length of 600 ft. What is the length of an aluminum conductor
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its resistance at 75°C? (Use do = 0.00427 /°C for copper) (1 pt)
3. The resistivity of a copper rod 50 ft long and 0.25 inch in diameter is 1.76 μ at 20°C. What is its resistance at -
20°C? (1 pt)
4. When two resistors A and B are connected in series, the total resistance is 36 2. When connected in parallel, the
total resistance is 8 Q. What is the ratio of the resistance RA to resistance RB? Assume RA < RB. (1 pt)
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Chapter 9 Solutions
Conceptual Physics (12th Edition)
Ch. 9 - Prob. 1RCQCh. 9 - What is the Newtonian synthesis?Ch. 9 - 3. In what sense does the Moon “fall”?
Ch. 9 - 4. State Newton’s law of universal gravitation....Ch. 9 - Prob. 5RCQCh. 9 - Prob. 6RCQCh. 9 - Prob. 7RCQCh. 9 - Prob. 8RCQCh. 9 - Prob. 9RCQCh. 9 - Where do you weigh more: at the bottom of Death...
Ch. 9 - Prob. 11RCQCh. 9 - 12. Would the springs inside a bathroom scale be...Ch. 9 - 13. When is your weight measured as mg?
Ch. 9 - Prob. 14RCQCh. 9 - Prob. 15RCQCh. 9 - Prob. 16RCQCh. 9 - Prob. 17RCQCh. 9 - Prob. 18RCQCh. 9 - Prob. 19RCQCh. 9 - Prob. 20RCQCh. 9 - Prob. 21RCQCh. 9 - Prob. 22RCQCh. 9 - Prob. 23RCQCh. 9 - Prob. 24RCQCh. 9 - Prob. 25RCQCh. 9 - Prob. 26RCQCh. 9 - If Earth shrank but there was no change in its...Ch. 9 - Prob. 28RCQCh. 9 - Prob. 29RCQCh. 9 - 30. What was the cause of perturbations discovered...Ch. 9 - Prob. 31RCQCh. 9 - Prob. 32RCQCh. 9 - Prob. 33RCQCh. 9 - Prob. 34RCQCh. 9 - Prob. 35RCQCh. 9 - Prob. 36RCQCh. 9 - Prob. 37RCQCh. 9 - Prob. 38RCQCh. 9 - 39. Suppose you stood atop a ladder so tall that...Ch. 9 - 40. Show that the gravitational force between two...Ch. 9 - 41. Show that there is no change in the force of...Ch. 9 - Prob. 42RCQCh. 9 - 43. Many people mistakenly believe that astronauts...Ch. 9 - Newton’s universal law of gravity tells us that...Ch. 9 - 45. The planet and its moon gravitationally...Ch. 9 - Prob. 46RCQCh. 9 - 47. Pretend you fall into a hole bored completely...Ch. 9 - 48. Rank the average gravitational forces from...Ch. 9 - Prob. 49RCQCh. 9 - Prob. 50RCQCh. 9 - 51. Gravitational force acts on all bodies in...Ch. 9 - 52. What would be the path of the Moon if somehow...Ch. 9 - Prob. 53RCQCh. 9 - Prob. 54RCQCh. 9 - Prob. 55RCQCh. 9 - 56. An apple falls because of the gravitational...Ch. 9 - Prob. 57RCQCh. 9 - 58. Is the acceleration due to gravity more or...Ch. 9 - 59. An astronaut lands on a planet that has the...Ch. 9 - 60. An astronaut lands on a planet that has twice...Ch. 9 - 61. If Earth somehow expanded to a larger radius,...Ch. 9 - 62. Why does a person in free fall experience...Ch. 9 - Prob. 63RCQCh. 9 - Prob. 64RCQCh. 9 - Prob. 65RCQCh. 9 - 66. What two forces act on you while you are in a...Ch. 9 - 67. If you were in a freely falling elevator and...Ch. 9 - Why does a bungee jumper feel weightless during...Ch. 9 - 69. Your friend says that the primary reason...Ch. 9 - 70. An astronaut in the International Space...Ch. 9 - Prob. 71RCQCh. 9 - 72. Stand on a bathroom scale on a level floor,...Ch. 9 - Prob. 73RCQCh. 9 - If somebody tugged hard on your shirt sleeve, it...Ch. 9 - 75. Most people today know that the ocean tides...Ch. 9 - Prob. 76RCQCh. 9 - 77. Would ocean tides exist if the gravitational...Ch. 9 - 78. Why aren’t high ocean tides exactly 12 hours...Ch. 9 - 79. With respect to spring and neap ocean tides,...Ch. 9 - Prob. 80RCQCh. 9 - Prob. 81RCQCh. 9 - 82. The human body is composed mostly of water....Ch. 9 - 83. The value of g at Earth’s surface is about 10...Ch. 9 - Prob. 84RCQCh. 9 - 85. If Earth were of uniform density, would your...Ch. 9 - Prob. 86RCQCh. 9 - Prob. 87RCQCh. 9 - Prob. 88RCQCh. 9 - Prob. 89RCQCh. 9 - Prob. 90RCQCh. 9 - 91. Somewhere between Earth and the Moon, gravity...Ch. 9 - 92. Earth and the Moon are attracted to each...Ch. 9 - Prob. 93RCQCh. 9 - Prob. 94RCQCh. 9 - Prob. 95RCQCh. 9 - Prob. 96RCQCh. 9 - Prob. 97RCQCh. 9 - Prob. 98RCQCh. 9 - Prob. 99RCQCh. 9 - Prob. 100RCQCh. 9 - Prob. 101RCQCh. 9 - Prob. 102RCQCh. 9 - Prob. 103RCQCh. 9 - Prob. 104RCQCh. 9 - Prob. 105RCQCh. 9 - Prob. 106RCQCh. 9 - Prob. 107RCQCh. 9 - Prob. 108RCQCh. 9 - A new discussion partner says that the...Ch. 9 - Prob. 110RCQ
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- 2. Two equally strong individuals, wearing exactly the same shoes decide to do a tug of war. The only difference is individual A is 2.5 meters tall and individual B is 1.5 meter tall. Who is more likely to win the tug of war?arrow_forward6. A car drives at steady speed around a perfectly circular track. (a) The car's acceleration is zero. (b) The net force on the car is zero. (c) Both the acceleration and net force on the car point outward. (d) Both the acceleration and net force on the car point inward. (e) If there is no friction, the acceleration is outward.arrow_forward9. A spring has a force constant of 100 N/m and an unstretched length of 0.07 m. One end is attached to a post that is free to rotate in the center of a smooth. table, as shown in the top view in the figure below. The other end is attached to a 1kg disc moving in uniform circular motion on the table, which stretches the spring by 0.03 m. Friction is negligible. What is the centripetal force on the disc? Top View (a) 0.3 N (b) 3.0 N (c) 10 N (d) 300 N (e) 1000 Narrow_forward
- 4. A child has a ball on the end of a cord, and whirls the ball in a vertical circle. Assuming the speed of the ball is constant (an approximation), when would the tension in the cord be greatest? (a) At the top of the circle. (b) At the bottom of the circle. (c) A little after the bottom of the circle when the ball is climbing. (d) A little before the bottom of the circle when the ball is descending quickly. (e) Nowhere; the cord is pulled the same amount at all points.arrow_forward3. In a rotating vertical cylinder (Rotor-ride) a rider finds herself pressed with her back to the rotating wall. Which is the correct free-body diagram for her? (a) (b) (c) (d) (e)arrow_forward8. A roller coaster rounds the bottom of a circular loop at a nearly constant speed. At this point the net force on the coaster cart is (a) zero. (b) directed upward. (c) directed downward. (d) Cannot tell without knowing the exact speed.arrow_forward
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