Adiffraction grating with 4000 lines/cm is illuminated by light from the sun. the solar spectrum is spread out on a white wall across the room. (a) at what angle from the center line does blue light (400 nm) appear? (b) at what angle from the center line does red light (650 nm) appear?

Scissors and a seesaw both cut things that’s the only comparison

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j