Someone shakes a string to create a wave. The string is tied to ...

[jayhills49]

Someone shakes a string to create a wave. The string is tied to the other side of a room. The wave takes 2.0 seconds to propagate from one end of a room to the other. If this experiment is repeated, how could the wave be made to travel across the room in 4.0 seconds?
  1.Shake the string half as quickly.
  2.Shake the string with vibrations that are half the amplitude.
  3.Double the string tension.
  4.Quarter the string tension.

Question 2

A sinusoidal wave of wavelength  travels along a stretched string. Then the string is brought to rest and a second simultaneous wave of wavelength 2 is established on the string. The frequency of the second wave is
  1.the same as that of the first wave.
  2.twice that of the first wave.
  3.half that of the first wave.
  4.2 times that of the first wave.

[alvinum]

Answer to Question 1

4

Answer to Question 2

3