Substance A and substance B, are in direct contact with each other and are at different temperatures

Can you use radiation to generate electricity

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20