Quarks come in what flavors?
a. up, down and strange b. charm, top and bottom
c. red, green and blue d. all of the above
a, b
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A coulomb is the same as:
A) an ampere/second B) half an ampere ? second2 C) an ampere/meter2 D) an ampere ?second E) a newton ?meter2
You carry a 7.0 kg bag of groceries 1.2 m above the level floor at a constant velocity of 75 cm/s across a room that is 2.3 m room. How much work do you do on the bag in the process?
A) 0.0 J B) 82 J C) 158 J D) 134 J
Proper time interval is the
A. time kept by the observatory in Greenwich, England B. time measured by any observer with a calibrated clock C. elapsed time between two events measured in a frame of reference in which the two events occur at the same time D. elapsed time between two events measured in a frame of reference in which the two events occur at the same point in space
A ball is thrown straight upward with an initial speed of 30 m/s. Assuming there is no air resistance, how high does the ball go before falling back down?