If the faster stone takes 12.0 s to return to the ground, how long will it take the slower stone to return?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

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?

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four