Arock is dropped from a bridge. what happens
to the magnitude of the acceleration and the
speed of the rock as it falls? [neglect friction.]
(1) both acceleration and speed increase.
(2) both acceleration and speed remain the
same.
(3) acceleration increases and speed decreases.
(4) acceleration remains the same and speed
increases.

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.