A 10-kg rock falls from a height of 8.0 m above the ground. What is the kinetic energy of the rock just before it hits the
ground?

In an experiment, how can i change human errors? be specific.

Which of these metals are magnetic?

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.