What is the speed of a 0.145kg baseball if it’s kinetic energy is 109 j

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?

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

In a good thermo flask the main cause of heat loss is