Suppose a rock is dropped off a cliff with an initial speed of 0 m/s. What is

the rock's speed after 3 seconds, in m/s, if it encounters no air resistance?

Two tiny spheres of mass 6.8 mg carry charges of equal magnitude

The density of oxygen is 1.43 x 10 - 3 kg/m3. If a canister of oxygen has a mass of 0.2 kg, find the volume.

Determine the wavelength, assume the density of the medium to be ρ=2.3⋅103kg/m3. express your answer using two significant figures.

If an object were released in space far away from planted or stars and given an initial momentum, describe what would happen to that objet

In the nuclear chain reaction of uranium-235, what particle reacts with the uranium nucleus to make it unstable?

April swims 50 m north and then turns and swims 20 m back to the south. What is her velocity if it takes her 60 seconds?

All the colors of visible light can combine to form white light. a. True b. False

If the results of a study do not support a hypothesis, it means that the experiment failed.

How does a rubber band obey the law of conservation of energy?

Shane observes that an upward force pushes him up when he sits on a chair. Based on his observation which statement is correct Friction can act at a distance. Normal force can act at a distance. The chair applies a non-contact force called friction.