An astronaut exploring a distant solar system lands on an unnamed planet with a radius of 3920 km. When the astronaut jumps upward with an initial speed of 3.41 m/s, she rises to a height of 0.525 m.

Anybody wanna ? (picture included? )

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?