If your heart is beating at 76.0 beats per minute, what is the frequency of your heart's oscillations?
A) 4560 Hz
B) 1450 Hz
C) 3.98 Hz
D) 2.54 Hz
E) 1.27 Hz
E
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An astronaut in an inertial reference frame measures a time interval ?t between her heartbeats. What will observers in all other inertial reference frames measure for the time interval between her heartbeats?
A) ?t B) more than ?t C) less than ?t D) The answer depends on whether they are moving toward her or away from her.
A series LRC ac circuit has a peak voltage of 111 V and a peak current of 2.00 A. If the current lags the voltage by 35.0°, what is the average power of the circuit?
A) 91 W B) 182 W C) 78 W D) 156 W
At most, how many bright fringes can be formed on each side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a double slit whose spacing is 1.97 × 10-6 m?
A) 1 B) 2 C) 3 D) 4 E) 5
A 200-kg flat-bottomed boat floats in fresh water, which has a density of 1000 kg/m3. If the base of the boat is 1.42 m wide and 4.53 m long, to what depth is the bottom of the boat submerged when it carries three passengers whose total mass is
A) 7.10 cm B) 7.53 cm C) 7.95 cm D) 8.52 cm