An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object?

0.25 m/s2

4 m/s2

O 60 m/s2

100 m/s2

Compare the frequency of an electromagnetic wave with the frequency of the vibrating charge that produces the wave.

Which of these would be the best definition of energy? A) the ability to do work B) the development of a future source of fuel C) the feeling one gets from drinking caffeine D) the feeling one feels after riding a roller coaster

Why does a partially inflated weather balloon expand as it rises? The balloon itself stretches over time. Air pressure inside the balloon decreases as the balloon rises. A change in temperature causes the balloon to expand.

Which force acts between two surfaces to prevent or slow motion

The north pole of one magnet and thr south pole of another magnet will do what

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?