Light strikes a flat mirror with an angle of incidence of 73º. At what angle does it reflect off at?

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

answer: a. same unit

explanation:

your answer is c! hope this : )

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards