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Author Question: Radiometric dating of a rock reveals an age of 1.52 billion years. Given that the half-life of the ... (Read 90 times)

jrubin

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on: Jul 27, 2018
Radiometric dating of a rock reveals an age of 1.52 billion years. Given that the half-life of the parent isotope used is 14.0 billion years, what percentage of the parent isotope is still present in the rock?
 
  A) 92.8
  B) 10.9
  C) 76.4
  D) 7.26

Question 2

A long rope of linear density 0.25 kg/m is under tension. Transverse waves travel on it at 30. m/s. How much energy is stored in 1.0 m of the rope when a driving frequency of 6.0 Hz produces a traveling wave with an amplitude of 0.10 m?
 
  What will be an ideal response?


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mbcrismon

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

0.043 J/m


jrubin

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


mbcrismon

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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