Each second, a nuclear power plant generates 2000 mj of thermal energy from nuclear reactions in the reactor's core. this energy is used to boil water and produce high-pressure steam at 300 degree c. the steam spins a turbine, which produces 700 mj of electric power, then the steam is condensed and the water is cooled to 30 degree c before starting the cycle again.
a. what is the maximum possible efficiency of the plant?
b. what is the plant's actual efficiency?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s