Which of these is the least penetrating in common materials

The material that keeps its new shape after it is stretched is called?

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.

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?