if you held a stone over the mouth of a well and then let it go , what would happen to the stone?Explain your answer.

How does convection affect our atmosphere? our layers of earth? our oceans?

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?

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished