Q. What mass of U 235 must undergo fission to operate a 1000 MW power plant for one day if the conversion efficiency is 27 %. Assume 208 MeV released per fission event.
Q. A small rocket to gather weather data is launched straight up. Several seconds into the flight, its velocity is 110 and it is accelerating at 17 . At this instant, the rocket's mass is 50 and it is losing mass at the rate of 0.45 as it burns fuel.