What must be the normal force acting on a crate as it slides across a horizontal floor if the friction acting on the box is 0.490N and the coefficient of friction is 0.250?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

If we relied solely on the nonrenewable resources found in the u. s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

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.