When you see a laser beam (not aimed in your it is because some of the light in the beam has been by something in the air.

a. absorbed
b. refracted
c. transmitted
d. scattered

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

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.