A 0.400-kg ball approaches a very massive wall at 20.0 m/s ...

[fbq8i]

A 0.400-kg ball approaches a very massive wall at 20.0 m/s perpendicular to wall and rebounds with 70.0 of its initial kinetic energy. What is the magnitude of the change in momentum of the wall?
 
  A)
 
  14.7 kgm/s
 
  B)
 
  13.6 kgm/s
 
  C)
 
  2.40 kgm/s
 
  D)
 
  1.31 kgm/s
 
  E)
 
  0.00 kgm/s

Question 2

A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. (a) Which capacitor has the greates charge? (b) Which capacitor has the greatest voltage?
 
  What will be an ideal response?

[Benayers]

Answer to Question 1

A

Answer to Question 2

(a) They all have the same charge.
(b) 1 mF

[fbq8i]

Wow, this really help

[irishcancer18]

Gracias!