Afriend is riding on the back of a truck that is going away from you at 20 km/h. as the truck passes, your friend throws a ball toward you at 60 km/h relative to her. how fast is the ball going relative to you?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus

Explain what will happen if decomposers were apsent from a forest ecoysystem.