the brakes on a car do 240000j of work in stopping the car. if the car travels a distance of 40m while the brakes re being applied. how large is the average force that the brakes exert the car?

A heat engine does 30 j of work per cycle while exhausting 50 j of waste heat. what is the engine's thermal efficiency?

Which fact is NOT true about gravity? Gravity depends on distance. Gravity depends on weight. The force of gravity between two objects will never be 0. Gravity depends on mass.

A 300 mm diameter well with a screen length 20 m is to be placed in an aquifer of thickness 40 m. a) Calculate the specific capacity of this well as percent of the maximum (full penetration).

The atomic nucleus contains two subatomic particles, the proton and the neutron. Atoms of different elements have different numbers of protons and neutrons.

As a marble rolls across the floor, it gradually slows to a stop due to friction. Which statement best describes the change in mechanical energy of this system? a.) Mechanical energy was transferred from the floor to the marble. b.

Which by freud domain would cover bullying

Electrons are a lot lower in mass than neutrons true or false

How can you measure mold on food?

The cooled lava pools on the surface of a crater are called what? 1. Craters 2. Terrae 3. Maria 4. Reoglith

A child walks 35 meters in 7 seconds. calculate the child's speed.