Stars on the main sequence with the greatest mass a. are ...

[Tazate]

Stars on the main sequence with the greatest mass
 
  a. are spectral type M stars.
  b. are spectral type O stars.
  c. are located at the bottom of the main sequence in the H-R diagram.
  d. have masses very similar to the Sun.
  e. are spectral type O stars and are located at the bottom of the main sequence in the H-R diagram.

Question 2

What is the frequency of the shortest wavelength light that can be detected by the average human eye?
 
  a. 0.0025 Hz
  b. 7.5  1014 Hz
  c. 3.0  108 m/s
  d. 700 nm
  e. 400 nm

[adammoses97]

Answer to Question 1

b

Answer to Question 2

b

[Tazate]

Excellent

[xoxo123]

Thanks for the timely response, appreciate it