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Author Question: A bone is dug up and analyzed and found to contain 1/16--one sixteenth--of the amount of 14C ... (Read 20 times)

Shelles

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on: Jul 29, 2018
A bone is dug up and analyzed and found to contain 1/16--one sixteenth--of the amount of 14C radioactivity of normal bones in living bodies. The half-life of 14C is 6000 years. Roughly how long has the individual been dead?
 
  A) 24, 000 years
  B) 6000 years
  C) 30,000 years
  D) 36,000 years
  E) Impossible to tell from the given information.

Question 2

If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60  10-19 C, k = 1/40 = 8.99  109 N  m2/C2, mel = 9.11  10-31 kg)
 
  A) 5.9  107 m/s
  B) 4.9  107 m/s
  C) 3.9  107 m/s
  D) 2.9  107 m/s


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amynguyen1221

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

A

Answer to Question 2

A


Shelles

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Reply #2 on: Jul 29, 2018
TY


amynguyen1221

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Reply #3 on: Jul 29, 2018
You're welcome


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