Need help on a few astronomy questions (10 pts)?

[dennie18]

i have a few astronomy questions i need help with. i am a finance major please give me a break ;p

If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope,__________ spectrum on the continuous spectrum results
A) a dark (absorption) line
B) a bright (emission) line
d) continuous .

the________of a telescope is a measure of its ability to show fine detail and depends on the diameter of the object.
a) light gathering power
b) focal lenght
c) magnifying power
d) resolving power


when a stars force of gravity exceeds its radiation pressure, the star will
a) contract
b) expand
d) turn into a red giant star

what underlying physical property of a star primarily determines its location on the main sequence ?
A) tempreture
b) age
c) distance from the galactic center
d) mass


tnx :DDDDD if the answers are right ill give you 10 pts asap