Consider two equal mass cylinders rolling with the same ...

[dakota nelson]

Consider two equal mass cylinders rolling with the same translational velocity.
 
  The first cylinder (radius = R) is hollow and has a moment of inertia about its rotational axis of M R2, while the second cylinder (radius = r) is solid and has a moment of inertia about its axis of 0.5 M r2. What is the ratio of the hollow cylinder's angular momentum to that of the solid cylinder? A) r2 to 2R2
  B) 2R2 to r2
  C) r to 2R
  D) 2R to r
  E) R to 2r

Question 2

Without the protection of the Earth's magnetic field, most of the atmosphere would by now have
 
  A) been lost into space
  B) frozen onto the surface
  C) dissolved in the oceans
  D) been destroyed by chemical reactions

[14vl19]

Answer to Question 1

D

Answer to Question 2

A

[dakota nelson]

Excellent

[Joy Chen]

Gracias!