A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant for this circuit?
a.
1.5 s
b.
1.3 s
c.
1.7 s
d.
1.9 s
e.
2.9 s
b
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Light enters glass from air. The angle of refraction will be
A) greater than the angle of incidence. B) equal to the angle of incidence. C) less than the angle of incidence.
When the intensity of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons
a. increases b. decreases c. stays the same d. becomes more quantized e. becomes less quantized
Some species of whales can dive to depths of one kilometer. What is the total pressure they experience at this depth? (?sea = 1 020 kg/m3 and 1.01 × 10^5 N/m2 = 1 atm.)
a. 9.00 atm b. 90.0 atm c. 100 atm d. 111 atm e. 130 atm
The lug nuts on a car wheel require tightening to a torque of 90 N ? m. If a 30-cm long wrench is used, what is the magnitude of the minimum force required using the wrench?
A) 30 N B) 15 N C) 300 N D) 150 N