Aroller coaster reaches its maximum kinetic energy when it. a) reaches the bottom of a hill. b) begins rolling down a hill. c) is sitting at the top of a hill. d) is starting up a hill.

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

If element x has 99 protons how many electrons does it have

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.