Spurs are probably the result of ____. a. self-sustaining star ...

[tiffannnnyyyyyy]

Spurs are probably the result of ____.
 
  a. self-sustaining star formation
  b. spiral density waves
 c. differential rotation
 d. the central galactic bar
 e. the short lifetime of O stars

Question 2

The equivalence principle can be best illustrated by ____.
 
  a. a person riding in an elevator
 b. a rocket coasting through space at a constant velocity
  c. the change in mass of a moving body
 d. the formation of energy by nuclear fusion
 e. a car ride on a highway with the windows open

[Carissamariew]

Answer to Question 1

a

Answer to Question 2

a

[tiffannnnyyyyyy]

YES! Correct, THANKS for helping me on my review

[scikid]

Thanks for the timely response, appreciate it