A4-kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2-kg block (sketch is at attached test) the pulley is a uniform disk of radius 8 cm and mass 0.6 kg. find (a) the speed of the 2-kg block after it falls from rest a distance of 2.5 m, and (b) the angular velocity of the pulley at this

What happens to the light rays when they hit the specimen?

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