Author Question: Per unit area (such as a square centimeter), a B star whose surface temperature is 10,000 K will put ... (Read 149 times)

ahriuashd · **on:** Jul 27, 2018

Per unit area (such as a square centimeter), a B star whose surface temperature is 10,000 K will put out how much radiation compared to an O star whose surface temperature is 30,000 K?

A) 81 times as much
B) 9 times as much
C) 1/81 as much
D) 1/9 as much
E) 1/3 as much

Question 2

Cluster ages can be determined from

A) main sequence fitting.
B) main sequence turnoff.
C) pulsating variable stars.
D) spectroscopic binaries.
E) visual binaries.