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Author Question: A radiation detector measures radioactivity decay of a piece of radium by catching and counting ... (Read 99 times)

SAVANNAHHOOPER23

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on: Jul 29, 2018
A radiation detector measures radioactivity decay of a piece of radium by catching and counting alpha particles it emits. Making this measurement affects the
 
  A) radiation rate of the piece of radium.
  B) alpha particles that are caught and counted.
  C) both of these
  D) neither of these

Question 2

What is the focal length of the combined lenses with individual powers of 8.0 diopters and 4.0 diopters?
 
  A) 8.0 cm
  B) 5.6 cm
  C) 6.0 cm
  D) 8.3 cm
  E) 4.0 cm


mcomstock09

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

Answer: B

Answer to Question 2

D


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SAVANNAHHOOPER23

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Reply #2 on: Jul 29, 2018
TY


mcomstock09

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


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