What is the velocity (in m/s) of a 550 kg roller coaster cart at the bottom of the track if it started with 990,000 J of gravitational potential energy at the top of the track? Assume a frictionless surface.

Which Best describes a characteristic of the jet stream?

What describes an atom when the number of electrons is less than the numbers of protons

The function of a capacitor in an electric circuit is to A. increase circuit power. B. measure the amount of current in the circuit. C. allow current flow between its plates. D. store electric charges.

1. Explain the change of state from solid dry ice to carbon dioxide gas. 2. The motion of the particles in dry ice and carbon dioxide gas. 3. Explain how the original mass of dry ice compares with the mass of carbon dioxide gas.

What are two ways in which the suns energy can be captured and used?

You and your housemate have an argument over the cost of the electric bill. You want to turn off the outside porch light before going to bed each night.

Work is a product of A force and distance B force and heat energy C cause and heat energy D cause and effect

An exploration submarine should be able to descend 1200 m down in the ocean. If the ocean density is 1020 kg/m3, what is the maximum pressure on the submarine hull?

Why cooking pans don't have have metal handles?

Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band