Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190 mm2. How much charge must be transferred from one plate to the other
if 1.1 nJ of energy are to be stored in the plates? (?00 = 8.85 × 10-12 C2/N ? m2)
A) 56 pC
B) 39 pC
C) 78 pC
D) 3.5 µC
A
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A 5.0-kg mass is placed at (3.0, 4.0) m, and a 6.0-kg mass is placed at (3.0, ?4.0) m. What is the moment of inertia of this system of masses about the x axis?
a. 280 kg·m2 b. 33 kg·m2 c. 176 kg·m2 d. 99 kg·m2 e. 44 kg·m2
The temperature of a quantity of ideal gas in a sealed container is increased from 0°C to 273°C. What happens to the rms speed of the molecules of the gas as a result of this temperature increase?
a. It does not change since rms speed is independent of temperature. b. It increases but it less than doubles. c. It doubles. d. It quadruples.
Why does it hurt more to fall from a certain height to the ground than it does to fall from the same height into a swimming pool?
What will be an ideal response?
The Millikan oil-drop experiment demonstrated that:
a. small oil drops fall slowly through the air. b. light beams can be used to illuminate small oil droplets. c. the electronic charge is quantized. d. falling oil droplets reach terminal speed.