The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is
a. 1.99
b. 1.07
c. 0.932
d. 0.511
e. 0.760
c
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You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about
A) 0.08 m/s2. B) 0.8 m/s2. C) 8.0 m/s2. D) none of the above
A capacitor of capacitance C = 5 ?F and initial charge Q = 30 ?C is connected to an inductor of inductance L = 20 mH. What is the electric current in the circuit when the energy stored in the capacitor is 25% of its maximum value?
A) 0.001 A B) 0.08 A C) 0.04 A D) 0.02 A E) 0.01 A
A pressure of 10.0 mm Hg is measured at the triple-point of water using a constant-volume gas thermometer. What will the pressure be (in mm Hg) at 50.0°C?
a. 68.3 b. 1.80 c. 31.8 d. 11.8 e. 8.50
An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should points in order to land on the runway is __________
Fill in the blank(s) with correct word