Taking a quiz now. incorrect answers will be reported.
a velocity vs time graph for an object is shown. which psrts of the graphs represents the object moving at a constant positive acceleration.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

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