A tennis ball is held above and in contact with a basketball, and ...

[olgavictoria]

A tennis ball is held above and in contact with a basketball, and then both are simultaneously dropped. The tennis ball bounces off the basketball at a fairly high speed. This is because:
 a. the basketball falls farther than the tennis ball.
  b. the tennis ball is slightly shielded from the Earth's gravitational pull.
  c. the massive basketball transfers momentum to the lighter tennis ball.
  d. the tennis ball has a smaller radius.

Question 2

An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of -10 C carefully placed at the center of the sphere through a hole in the latter's surface. What charge resides inner surface of the sphere?
 a. -10 C
  c. +10 C
  b. zero
  d. -4000 C

[jamesnevil303]

Answer to Question 1

C

Answer to Question 2

C

[olgavictoria]

Thanks for the timely response, appreciate it

[Liamb2179]

Excellent