Temperature and Thermal Energy Answers

When Javier touches a hot mug of tea, energy is transferred from the surface of the mug to his hand. What kind of energy is this?

Which is occurring when work is being done?

A powered winch is used to pull a sailboat to shore. The winch uses a 900 W motor.If the motor is used for 30 s, how much work does it do? (Power: P = W/t)

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

What is the source of almost all energy on Earth?

What is needed for work to be done?

Which statement describes how a machine can help make work easier?

How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?

A wheelbarrow can be used to help lift a load, such as a pile of dirt, and then push the load across a distance.

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

The table shows information about four students who are running around a track. Which statement is supported by the information in the chart?

What is the mechanical advantage of a pulley that changes only the direction of the load, not the effort force?

Which term is the product of force and distance?