A Ferris wheel rotating from rest to final angular speed of 0.70 rad/s makes angular displacement of 4.9 rad. Find the average angular acceleration? a)0.10 rad/s^2
b)0.05 rad/s^2
c)1.8 rad/s^2
d)0.60 rad/s^2

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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