Protostars can be observed in
A) the Crab Nebula.
B) the Andromeda Galaxy.
C) the Orion Nebula.
D) our Solar System.
E) the Helix Nebula.
C
You might also like to view...
The type of EM wave used in aircraft radar is
a. radio waves. b. microwaves. c. x-rays. d. gamma rays.
At the instant a 2.0-kg particle has a velocity of 4.0 m/s in the positive x direction, a 3.0-kg particle has a velocity of 5.0 m/s in the positive y direction. What is the speed of the center of mass of the two-particle system?
A. 3.8 m/s B. 3.4 m/s C. 5.0 m/s D. 4.4 m/s E. 4.6 m/s
Ocean waves with a wavelength of 120 m are coming in at a rate of 8 per minute. What is their speed?
a. 8.0 m/s b. 16 m/s c. 24 m/s d. 30 m/s e. 4.0 m/s
The mass of 6 million atoms of a diatomic gas is 
What is the atomic mass of this gas?
A. 25.5 u B. 51.0 u C. 2.55 u D. 5.10 u