Aperson pushes a box across a horizontal surface at a constant speed of 0.5 meter per second. the box has a mass of 40 kilograms, and the coefficient of sliding friction is 0.25. the power supplied to the box by the person is

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.