Identify two simple machines in this compound machine.

a. screw, lever

b. screw, incline plane

c. double pulley

d. lever, pulley

What units are assumed for speed limit signs in the United States

Why the following statement could be considered a scientific theory: the rotation of earth causes the sun to set

Think about the pencil-dropping activity that you did in the introduction. What did the target finally look like?

All but which of the following might cause a tsunami? a. volcanic eruption b. flooding c. landslide d. earthquake

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 statement is true about a polarized object? A) It gains electrons and becomes negatively charged. B) It gains protons and becomes positively charged. C) The number of positive and negative charges can be the same. D) It has to be a metal.

Define the law of conservation of momentum in one sentence

A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of - 0.418m/s. How much time did it take? (unit=s)

Where does the energy of a nuclear power plant come from?

When the vapor pressure of a liquid is equal to the atmospheric pressure the liquid?