The circumference of a circle is 60π cm. what is the length of an arc of 140°?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

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