True or false the potential energy of a freely falling object increases as it begins to fall

A pair of electrically charged objects attract each other with a force of 20 n when they are a distance of 5 m apart. if their charges stay the same, then what will be the attractive force between them when they are 20 m apart?

How fast does a 200-hz sound wave with a wavelength of 3.1 m travel?

If a hydrogen atom has one proton, two neutrons, and no electrons is this atom neutrally charged

If the x-component of a force vector is 5.17 newtons and its y-component is 8.80 newtons, then what is its magnitude?

The train departed 100 meters in 10 seconds How far has the train gone in the last 2 seconds

What is the oxidation state of a hydrogen atom bound to an iron atom.?

What evidence can you present for the possibility of time travel?

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?

One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15 feet. what is the area of the kite?