If your heart is beating at 76.0 beats per minute, what is the frequency of your heart's oscillations in hertz?
A) 2.54 Hz B) 3.98 Hz C) 4560 Hz D) 1450 Hz E) 1.27 Hz
E
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Mercury is visible to us:
A. only in the summer. B. only in the winter. C. only very briefly near sunrise or sunset. D. only during its new phase. E. only during the several hours around midnight
Projectile Motion: A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water, assuming negligible air resistance?
A. 14 m B. 16 m C. 20 m D. 24 m
AC Generator: An ac generator contains 80 flat rectangular loops of wire, each of which is 12 cm long and 8 cm wide. The loops rotate at 1200 rpm about an axis through the center and parallel to the long side. If the magnetic field in which the loop rotates is uniform, has magnitude 0.30 T, and is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator?
A. 20 V B. 27 V C. 29 V D. 35 V
A liter is equivalent to 33.8 fluid ounces. How many liters of gasoline are required to fill a 21 gallon gas tank, if 1 gallon is equivalent to 128 fluid ounces?
A. 210 liters B. 710 liters C. 80 liters D. 6 liters