Which of the following characteristic is not applicable in ratio waves

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?