A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the brakes were applied. In approximately what distance would the car have stopped had it been going 105.4 mph?
A) 29 m B) 90 m C) 51 m D) 158 m E) 279 m
E
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The most detailed look we've had of an asteroid comes from
A) spacecraft sent to an asteroid. B) ground-based radar images. C) Earth orbital X-ray images. D) ground-based optical images. E) high-altitude UV spectroscopy.
Observer A sees a ruler moving by in a relativistic train and measures its length to be LA. Observer B moves together with the train and measures the length of the ruler to be LB. These two results will be such that
A) LA > LB. B) LA = LB. C) LA < LB. D) LA could be greater or smaller than LB depending on the direction of the motion.
A 2 000-kg sailboat experiences an eastward force of 4 500 N by the ocean tide and a wind force against its sails with magnitude of 1 500 N directed toward the northwest (45° N of W). What is the direction of the resultant acceleration?
a. 27° N of W b. 58° N of W c. 27° N of E d. 17° N of W e. 17° N of E
A 2.0-?F capacitor in series with a 2.0-k? resistor is connected to a 60-Hz ac source. Calculate the impedance of the circuit
a. 1 500 ohms b. 1 800 ohms c. 2 100 ohms d. 2 400 ohms e. 8 600 ohms