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Home Q & A Board Science-Related Homework Help Physics Astronomy
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ridhima14598 ridhima14598
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6 years ago
A radioactive substance containing 4.00  1016 unstable atoms has a half-life of 2.0 days. What is its activity (in curies) after 1 day?
 
  What will be an ideal response?

Question 2

In the fission reaction 235U + 1n 141Ba + 92Kr + neutrons, the number of neutrons produced is
 
  A) 0.
  B) 4.
  C) 1.
  D) 3.
  E) 2.

Question 3

Suppose that in a certain collection of nuclei there were initially 1024 nuclei and 20 minutes later there was only one nuclei left, the others having decayed.
 
  On the basis of this information, how many nuclei would you estimate decayed in the first 6 minutes?

Question 4

The Q value for a particular reaction is -2.4 MeV, and the reaction's threshold energy is 9.60 MeV. What is the ratio of the mass of the incident particle to the mass of the stationary target nucleus?
 
  A) 5
  B) -0.75
  C) 3
  D) 0.25
  E) 4

Question 5

If the half life for Radium-226 is 1600. years, how long is the quarter life?
 
  What will be an ideal response?
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blvanblvan
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6 years ago
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ridhima14598 Author
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#2
6 years ago
Wow! Thanks you for this correct set of answers, wasn't expecting it...
wrote...
#3
6 years ago
My pleasure!
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