A 40.0 kg projectile leaves a 2200 kg launcher with a speed of 800 m/s. What is the recoil velocity of the launcher?

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

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?