If a car is left on a hill without a hand break why will it roll down the hill?

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?

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created

Which is a substance that can be separated by physical means and is not the same throughout