Unit Test — Unit test Answers

Which of these results in kinetic energy of an object?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

Which of these indicates that a liquid has transferred thermal energy to the air?

Adita lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adita doing work on the book?

What is needed for work to be done?

Nuclear energy is currently used in which three kinds of vehicles?

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

What is the source of almost all energy on Earth?

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?

Which refers to the thermal energy that flows from one substance to another when the substances differ in temperature?

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

Which two types of potential energies would be types of mechanical energies?

How does the Sun release nuclear energy?

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

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?

Heat transfer between two substances is affected by specific heat and the

Which is occurring when work is being done?

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

Simone created a chart to summarize the energy transformations that take place when energy from the wind is used to generate electricity.Which best completes the chart?

A stovetop burner on medium reaches 95°C. Which will also receive a flow of heat directly from the burner?