When a 6.00-?F air-filled capacitor has a charge of ±40.0 ?C on its plates, how much potential energy is stored in this capacitor?
A) 103 ?J
B) 113 ?J
C) 123 ?J
D) 133 ?J
E) 143 ?J
D
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Determine the wetted perimeter and the hydraulic diameter DH, for a circular tube filled with R-134a liquid as shown in the sketch.
What will be an ideal response?
Which of the following best describes why we say that light is an electromagnetic wave?
A) The passage of a light wave can cause electrically charged particles to move up and down. B) Light can be produced only by electric or magnetic appliances. C) Light is produced only when massive fields of electric and magnetic energy collide with one another. D) The term electromagnetic wave arose for historical reasons, but we now know that light has nothing to do with either electricity or magnetism.
The intensity level is 65 dB at a distance 5.00 m from a barking dog. What would be a reasonable estimate for the intensity level if two identical dogs very close to each other were barking? You can ignore any interference effects
A) 65 dB B) 68 dB C) 130 dB D) 136 dB
For safety in climbing, a mountaineer uses a 50-m long nylon rope that is 1.0 cm in diameter. When supporting a 90-kg climber, the rope elongates 1.6 m. Find the Young's modulus for the rope material