Author Question: What happens to the surface temperature and luminosity when a protostar radiatively contracts? A) ... (Read 35 times)

ARLKQ · **on:** Jul 27, 2018

What happens to the surface temperature and luminosity when a protostar radiatively contracts?

A) Its surface temperature and luminosity increase.
B) Its surface temperature remains the same and its luminosity decreases.
C) Its surface temperature and luminosity decrease.
D) Its surface temperature decreases and its luminosity increases.
E) Its surface temperature and luminosity remain the same.

Question 2

Processed meteorites with low metal content probably are

A) leftover chunks of rock from the earliest period in the formation of the solar system.
B) pieces of comets rather than of asteroids.
C) chunks of a larger asteroid that was shattered by a collision.
D) chunks of rock chipped off the planet Mercury.
E) chunks of rock chipped off the planet Mars.