Does someone know a device that can reflect a laser beam in order to project an image? I remember years ago I saw a microchip that had an array of small mirrors, and was able to modify the angle of those mirrors... I think it was from Texas Instruments.
There is a man attached to a relatively long string with a steel ball
on the other end. This man we will call "Popeye", is strong enough to
lift the ball and throw it up:
1. What's the relation between forces, speed, mass, to make the ball
drag Popeye up thru the air? There are only basic...