A ray of light reflected from a mirror which is
750m from a screen creates a spot on the
screen. If the spot moves along the vertical
plane through a distance of 620m, through
what angle in the vertical plane must mirror
be rotated?

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

Sound is a disturbance that travels through a medium as a

What sort of waves exhibit the doppler effect?