Two planets have the same surface gravity, but planet b has twice the radius of planet a. if planet a has mass m, what is the mass of planet b? a. m/ b. m c. m d.4m e. m/4

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.