Do rolling down a grassy hill has kinetic energy or potential energy

Friction is generated when?

Why were IC engines invented and by who?

Why does the pencil appear broken in the cup of water? Question options: Electromagnetic/Light waves compress more when they travel through denser media. Electromagnetic/Light waves cannot travel through solids.

The average speed of a person in driving to school is 30 km/h. on the return trip along with the same route, the average speed is 25km/h. what is the average speed for the round trip to the school

The term time dilation refers to which effect?

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?

How does Newton's second law apply to an "Egg Drop" experiment?

A 4.0-n puck is traveling at 3.0 m/s. it strikes an 8.0-n puck, which is stationary. the two pucks stick together. their common final speed is:

What career has to do with one of these listed ... fossil fuels, nuclear energy, biomass, hydropower, solar energy, geothermal energy, or wind energy.

An object is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150 N. What is the tension in each wire? 41.6 newtons 82.3 newtons 150 newtons 117 newtons