Scientist suggest that galaxies are moving away from Earth due to
A. Dark energy
B. Doppler shift
C. Energy
D. Solar energy

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)

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather