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Author Question: A pair of tennis balls fall through the air from a tall building. One ball is regular and the other ... (Read 128 times)

stevenposner

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on: Jul 29, 2018
A pair of tennis balls fall through the air from a tall building. One ball is regular and the other is filled with lead pellets. Air resistance just before they hit is greater for the
 
  A) regular ball.
  B) lead-filled ball.
  C) same for both

Question 2

The naturally-occurring isotope that will sustain a fission chain reaction is
 
  A) tritium, i.e., 3H.
  B) 14C.
  C) 239Pu.
  D) 238U.
  E) 235U.


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mjenn52

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

E


stevenposner

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


mjenn52

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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