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Author Question: Two billiard balls have velocities of 2.0 m/s and -1.0 m/s when they meet in an elastic head-on ... (Read 31 times)

Melani1276

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on: Jul 28, 2018
Two billiard balls have velocities of 2.0 m/s and -1.0 m/s when they meet in an elastic head-on collision. What is the final velocity of the second ball after collision?
 a. +2.0 m/s
  c. -0.5 m/s
  b. -1.0 m/s
  d. +1.0 m/s

Question 2

A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric field strength at various points outside the sphere surface. If the probe is initially at a distance 3R from the sphere's center and then is moved to 5R, by what factor will the electric field reading change?
 a. 3/5
  c. 5/3
  b. (5/3)2
  d. (3/5)2


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guyanai

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Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


Melani1276

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


guyanai

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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