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Author Question: If originally there were X atoms of radioactive isotope present and now there are only X/16 atoms, ... (Read 190 times)

Pea0909berry

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on: Jul 27, 2018
If originally there were X atoms of radioactive isotope present and now there are only X/16 atoms, how many half-lives have elapsed?
 
  A) 4
  B) 1
  C) 2
  D) 3

Question 2

Describe the differences between secular and diffuse reflection.
 
  What will be an ideal response?


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BAOCHAU2803

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

A

Answer to Question 2

Specular reflection occurs when the reflecting surface is smooth and flat. The reflected rays from parallel incident rays are also parallel. Diffuse reflection occurs when the reflecting surface is rough. The reflected rays from parallel incident rays are not parallel because of the irregular nature of the surface.


Pea0909berry

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Reply #2 on: Jul 27, 2018
Thanks


BAOCHAU2803

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Reply #3 on: Jul 27, 2018
Welcome :)


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