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Author Question: A radioactive substance containing 4.0 1016 unstable atoms has a half-life of 2.0 days. What is its ... (Read 69 times)

Pineapplelove6

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on: Jul 29, 2018
A radioactive substance containing 4.0  1016 unstable atoms has a half-life of 2.0 days. What is its activity (in curies, Ci) after 1.0 day? (1 Ci = 3.70  1010 Bq)
 
  What will be an ideal response?

Question 2

An object of mass 8.0 kg is attached to an ideal massless spring and allowed to hang in the Earth's gravitational field. The spring stretches 3.6 cm before it reaches its equilibrium position.
 
  If this system is allowed to oscillate, what will be its frequency?
  A) 0.0045 Hz B) 0.67 Hz C) 2.6 Hz D) 2.1 Hz


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rekilledagain

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

4.3 Ci

Answer to Question 2

C


Pineapplelove6

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Reply #2 on: Jul 29, 2018
Thank you!


rekilledagain

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Reply #3 on: Jul 29, 2018
Always glad to help...


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