A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh)

Describe what a convection current is in how it was material than the earth

Which is a correct description of Hooke's law? 1. The force applied to a spring equals the product of the spring constant and the displacement. 2. The force applied to a spring equals the spring constant divided by the displacement. 3.

A sprinter set a high school record in track and field, running 200.0 m in 20.6 s. what is the average speed of the sprinter in kilometers per hour?

What principle states that any ray of light subjected to reflection or refraction can be traced in reverse by a ray in the opposite direction?

What would be an example of higher concentration for a liquid? A. 1% milk versus 2% milk B. cooling a liquid until it nearly freezes C. boiling pure water until half its mass has left the pot D.

What is the transfer of heat through a solid as a result of molecular action called? radiation convection conduction magnetism?

Explain the process of synaptic transmission, beginning with the neurotransmitters at the axon terminal of the presynaptic cell and ending with the impulse being sent down the postsynaptic cell.

Which of the following is a false statement about dispersion forces? View Available Hint (s) Which of the following is a false statement about dispersion forces?

Which choice defines AC and DC correctly? In AC, electrons moving in one direction. In DC, they move in one direction and then in the other direction. In DC, electrons move in only one direction.

Why a c is advantageable than dc