1. what causes an object to be at rest? describe why it might not truly be at rest.

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection