Voltage sources are used to sustain

a. the flow of protons

b. chemical reactions

c. resistance

d. the movement of electric charge

The power grid is the system that transfers electricity to homes and businesses. A power plant produces electricity. The output electricity is an input for the wires that lead to power sub stations.

If two materials are made from different kinds of atoms, what else should you expect to be different? a. the kinds of neutrons they have b. the properties they have c. the mass of their electrons d. the charge of their protons

What can happen when two plates bordering each other suddenly move and release energy a. Earths crust shakes b. Lava erupts c. a trench is formed d. Mountains are created

The medium of a mechanical wave is the matter through wich it travels? tru or false

Scott is making a chart to show the difference between chemical reactions and nuclear reactions. Which part of his chart is incorrect?

A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Assume that any other unbalanced forces are negligible. What is the speed of the wreckage just after the collision?

What is the spine also known as

If a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is his average momentum?

Two lamps one rated 40W at 220 V and the other 60W at 220 V are connected in parallel to the electric supply at 220V.

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevator?