A car moving at a constant speed travels past a valley in the road, as shown below. Which of the arrows shown most closely approximates the direction of the car’s acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
A. A
B. B
C. C
D. D
E. E
F. F
T. T
A. A
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What is the magnitude of the approximate magnification of a compound microscope with objective and eyepiece focal lengths of 0.90 cm and 3.6 cm, respectively, and a separation between lenses of 20 cm?
a. 460 c. 20 b. 12 d. 150
If the volume of an object were doubled while its mass remained the same, its density would
A) be half. B) double. C) stay the same. D) be four times as great.
A circular coil with 600 turns has a radius of 15 cm. The coil is rotating about an axis perpendicular to a magnetic field of 0.020 T
If the maximum induced emf in the coil is 1.6 V, at what angular frequency is the coil rotating? A) 0.30 rad/s B) 1.9 rad/s C) 1.4 rad/sec D) 0.60 rad/s E) 0.90 rad/s
A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A) 6.1 m/s B) 7.4 m/s C) 8.1 m/s D) 8.9 m/s