How much energy is required to heat 65 kg of water from 25 C to 55 C in a hot water heater with an efficiency of 65 percent, given the specific heat of water is 4.18 J/g/C

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?