Use the figure shown below to complete the following statement: As a protostar contracts, 
A) the luminosity decreases.
B) the luminosity increases.
C) the temperature increases.
D) the temperature decreases.
E) either the luminosity decreases or the temperature increases.
Correct Answer:
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Q37: Of the following processes at work in
Q38: Radio waves with 21-cm wavelengths are important
Q39: Dust that is heated to 30 K
Q40: Magnetic fields inside a molecular cloud act
Q41: What happens as a protostar contracts?
A) Its
Q43: A protostar is
A) in hydrostatic equilibrium as
Q44: An accretion disk forms around a collapsing
Q45: Brown dwarfs are considered failed stars because
A)
Q46: What critical event transforms a protostar into
Q47: As a protostar is evolving, its temperature
A)
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