You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 4 cm wide but 7 mm high. You must move your hand up and down once,
A) the same distance up as before, but take a shorter time.
B) the same distance up as before, but take a longer time.
C) a smaller distance up, but take a shorter time.
D) a greater distance up, but take a longer time.
E) a greater distance up, but take the same time.

Question

Quizplus · Accepted Answer

To produce a wave pulse that is higher (7 mm instead of 5 mm), you need to move your hand a greater distance up. The width of the pulse (4 cm) is determined by the time it takes for your hand to move up and then down. Since the width of the pulse remains the same, the time taken for the hand movement should also remain the same.

You Are Holding on to One End of a Long