6. A student placed a cardboard box at the bottom of a hill. The student then released a ball from a point on the hill. The ball collided with the box, and the box moved a distance of 2 meters before both it and the
ball came to rest. Which change to the initial conditions would be most likely to result in the box moving
a greater distance?

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?