A ball rolls off the edge of a table at the same time another ball drops vertically from the same table. The ball to hit the floor first is the
A) rolling ball.
B) dropped ball.
C) both hit at the same time
Answer: C
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The fact that light can be polarized shows that light is
a. polar. b. monochromatic. c. an electromagnetic wave. d. a transverse wave.
In western movies you often see a person putting his ear against the rails in the train tracks to find out if a train is approaching. Why would this give him advance knowledge of the approach of a train?
What will be an ideal response?
The fact that a spacecraft does not have to fire its engines continuously as it moves in space is a consequence of
a. Snell's law. b. Newton's Third Law of motion. c. Einstein's theory of relativity. d. Newton's First Law of motion. e. Newton's Second Law of motion.
A television advertisement claiming that a product is light-years ahead of its time does not make sense because
A) it doesn't specify the number of light-years. B) it uses "light-years" to talk about time, but a light-year is a unit of distance. C) a light-year is an astronomically large unit, so a product could not possibly be so advanced. D) light-years can only be used to talk about light.