Which were predictions based on the big bang theory? select all that apply.
leftover radiation exists from the big bang
low-mass stars become white dwarfs
high-mass stars become neutron stars
hydrogen and helium exist in abundance
the universe is still expanding

Aray diagram for a refracted light day is shown. what does the dashed line represent

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount