Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 23, Problem 88RCQ
The damaging effects of electric shock result from the amount of current that flows in the body. Why, then, do we see signs that read “Danger---High Voltage” rather than “Danger---High Current”?
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The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE ONLY TRIGNOMETRIC FUNCTIONS (SIN/TAN/COS, NO LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!
The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE DO NOT USE LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!
Chapter 23 Solutions
Conceptual Physics (12th Edition)
Ch. 23 - Prob. 1RCQCh. 23 - What condition is necessary for the sustained flow...Ch. 23 - Prob. 3RCQCh. 23 - Prob. 4RCQCh. 23 - Prob. 5RCQCh. 23 - Prob. 6RCQCh. 23 - Does electric charge flow across a circuit or...Ch. 23 - Prob. 8RCQCh. 23 - Does heating a metal wire increase or decrease its...Ch. 23 - Prob. 10RCQ
Ch. 23 - Prob. 11RCQCh. 23 - Prob. 12RCQCh. 23 - Prob. 13RCQCh. 23 - Prob. 14RCQCh. 23 - Prob. 15RCQCh. 23 - Prob. 16RCQCh. 23 - Prob. 17RCQCh. 23 - Prob. 18RCQCh. 23 - Prob. 19RCQCh. 23 - Prob. 20RCQCh. 23 - Prob. 21RCQCh. 23 - Prob. 22RCQCh. 23 - Prob. 23RCQCh. 23 - Prob. 24RCQCh. 23 - Prob. 25RCQCh. 23 - Prob. 26RCQCh. 23 - Prob. 27RCQCh. 23 - Prob. 28RCQCh. 23 - Prob. 29RCQCh. 23 - Prob. 30RCQCh. 23 - Prob. 31RCQCh. 23 - Prob. 32RCQCh. 23 - Prob. 33RCQCh. 23 - Prob. 34RCQCh. 23 - Prob. 35RCQCh. 23 - 36. Send a letter to Grandma and convince her that...Ch. 23 -
Ohm’s law:
37. A toaster has a heating element...Ch. 23 - Prob. 38RCQCh. 23 - 39. Calculate the current in the 240-Ώ filament of...Ch. 23 - Power
40. An electric toy draws 0.5 A from a...Ch. 23 - 41. Calculate the power of a hair dryer that...Ch. 23 - 42. What is the effect on the current in a wire if...Ch. 23 - Prob. 43RCQCh. 23 - 44. Rearrange the equation current = voltage/...Ch. 23 - Prob. 45RCQCh. 23 - 46. The total charge that an automobile battery...Ch. 23 - Prob. 47RCQCh. 23 - 48. A 4-W night-light is plugged into a 120-V...Ch. 23 - Prob. 49RCQCh. 23 - 50. Show in the preceding problem that 540 C of...Ch. 23 - Prob. 51RCQCh. 23 - 52. Rank the circuits illustrated according to the...Ch. 23 - 53. The bulbs shown are identical. An ammeter is...Ch. 23 - 54. All bulbs are identical in the circuits shown....Ch. 23 - 55. All bulbs are identical in the circuits shown....Ch. 23 - 56. Consider the three parts of the circuit: A,...Ch. 23 - Prob. 57RCQCh. 23 - Prob. 58RCQCh. 23 - Prob. 59RCQCh. 23 - 60. Consider a circuit with a main wire that...Ch. 23 - Prob. 61RCQCh. 23 - Prob. 62RCQCh. 23 - 63. The circuit within an incandescent lamp is...Ch. 23 - Prob. 64RCQCh. 23 - 65. How much energy is given to each coulomb of...Ch. 23 - Prob. 66RCQCh. 23 - Prob. 67RCQCh. 23 - 68. In which of the circuits shown does a current...Ch. 23 - Prob. 69RCQCh. 23 - 70. Something gets “used up” in a battery that...Ch. 23 - Prob. 71RCQCh. 23 - Prob. 72RCQCh. 23 - Prob. 73RCQCh. 23 - 74. Why is the current in an incandescent bulb...Ch. 23 - Prob. 75RCQCh. 23 - 76. Why are all compact fluorescent lamps more...Ch. 23 - Prob. 77RCQCh. 23 - Prob. 78RCQCh. 23 - Prob. 79RCQCh. 23 - 80. What causes electric shock: current or...Ch. 23 - Prob. 81RCQCh. 23 - Prob. 82RCQCh. 23 - Prob. 83RCQCh. 23 - 84. As more lines are opened at a fast-food...Ch. 23 - Prob. 85RCQCh. 23 - 86. Which is the same for a 10-Ω and a 20-Ω...Ch. 23 - Prob. 87RCQCh. 23 - The damaging effects of electric shock result from...Ch. 23 - Prob. 89RCQCh. 23 - Prob. 90RCQCh. 23 - 91. Which will do less damage: plugging a 110-V...Ch. 23 - Prob. 92RCQCh. 23 - Prob. 93RCQCh. 23 - Prob. 94RCQCh. 23 - Prob. 95RCQCh. 23 - Prob. 96RCQCh. 23 - 97. What happens to the brightness of bulb A when...Ch. 23 - Prob. 98RCQCh. 23 - 99. In the circuit shown, how do the brightness’s...Ch. 23 - Prob. 100RCQCh. 23 - Prob. 101RCQCh. 23 - Prob. 102RCQCh. 23 - 103. When a pair of identical resistors are...Ch. 23 - Prob. 104RCQCh. 23 - Prob. 105RCQCh. 23 - 106. Are these three circuits equivalent? Why or...Ch. 23 - Prob. 107RCQCh. 23 - Prob. 108RCQCh. 23 - Prob. 109RCQCh. 23 - Prob. 110RCQCh. 23 - To connect a pair of resistors so that their...Ch. 23 - Prob. 112RCQCh. 23 - Prob. 113RCQCh. 23 - Prob. 114RCQCh. 23 - Prob. 115RCQCh. 23 - Prob. 116RCQCh. 23 - Prob. 117RCQCh. 23 - Prob. 118RCQCh. 23 - Prob. 119RCQCh. 23 - (a) What single resistor would be equivalent to...Ch. 23 - 121. Three 6-ohm resistors are arranged in a...
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