The ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound True or False

With i really need the correct answer!

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

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