PHYSICS 7A Midterm: physics7A-sp2010-mt2-Mueller-exam
Document Summary
A pumped-storage hydroelectricity plant consists of an upper lake that is elevated 350 m relative to the lower lake. A volume of 1. 1!106 m3 of water (density 1. 0!103 kg/m3) can be taken out of the upper lake. This water volume supports 1. 0 hour of full load operation. This velocity needs to be provided by the launch rocket. What is the kinetic energy of the satellite: to make the launch easier, the satellite is launched at the equator. [hint: what is the velocity of the rocket, relative to the center of the earth, when it is just sitting on the equator?: the acceleration of gravity gm on the moon is 1/6 the one on earth. A grandfather clock"s pendulum consists of a rigid rod of length l=1. 100 m and mass m=1. 000 kg to which a mass m of 5. 000 kg (of negligible size) is attached. The pendulum is free to rotate around the upper end of the rod.
