Two different objects are moving with different velocities until they strike each other, stick to each other, and begin moving together. if each object’s mass is known and each object’s initial velocity is known, then the final velocity can be predicted using the law of conservation of a. energy b. momentum c. force d. speed

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.