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?

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2