What is the best example of rotational motion

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?