The mass of the Milky Way galaxy is a few ____. a. million ...

[urbanoutfitters]

The mass of the Milky Way galaxy is a few ____.
 
  a. million solar masses
 b. hundreds of millions of solar masses
  c. billion solar masses
 d. hundreds of billions of solar masses
  e. trillion solar masses

Question 2

The radius of Earth is 6,378 km. The force of gravity on a 1 kg ball at Earth's surface is 9.8 kg m/s2 . What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67 10-11 m3/s2/kg
 
  a. 2.45 kg m/s2
  b. 4.9 kg m/s2
 c. 9.8 kg m/s2
 d. 19.6 kg m/s2
  e. 39.2 kg m/s2

[shoemake]

Answer to Question 1

d

Answer to Question 2

a

[urbanoutfitters]

Thanks for the timely response, appreciate it

[atrochim]

Gracias!