A toy car is at the top of a ramp. It has 20 J of gravitational potential energy. When it runs down the ramp and reaches the bottom it has zero gravitational potential energy.

Assuming friction and air resistance have no effect, how much kinetic energy does it have at the bottom of the ramp?

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus