A rocket explodes into two fragments, one 25 times heavier than ...

[fbq8i]

A rocket explodes into two fragments, one 25 times heavier than the other. The magnitude of the momentum change of the lighter fragment is
 
  A) 25 times as great as the momentum change of the heavier fragment.
  B) The same as the momentum change of the heavier fragment.
  C) 1/25 as great as the momentum change of the heavier fragment.
  D) 5 times as great as the momentum change of the heavier fragment.
  E) 1/4 as great as the momentum change of the heavier fragment.

Question 2

If a spherical concave mirror has a radius of curvature R, its focal length is
 
  A) R/4.
  B) R/2.
  C) R.
  D) 2R.
  E) 4R.

[joechoochoy]

Answer to Question 1

B

Answer to Question 2

B

[fbq8i]

Great answer, keep it coming

[miss.ashley]

Thanks for the timely response, appreciate it