Astudent produces a wave in a long spring by
vibrating its end. as the frequency of the vibration
is doubled, the wavelength in the spring is
(1) quartered (3) unchanged
(2) halved (4) doubled

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.