Atruck with 28-in.-diameter wheels is traveling at 50 mi/h. find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes: rad/min how many revolutions per minute do the wheels make? rpm

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

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

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.