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Author Question: How can a half-life be used to tell the age of a sample? A) The half-life of an isotope is ... (Read 122 times)

bio_gurl

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on: Jul 29, 2018
How can a half-life be used to tell the age of a sample?
 
  A) The half-life of an isotope is constant.
  B) The amount of radioactive form depends on the amount of radiation in the surroundings.
  C) The ratio between the radioactive form and the stable form depends on the archaeological record.
  D) The ratio between the radioactive form and stable form varies regularly with time.
  E) both C and D

Question 2

When a beam of light, originally traveling in air, enters a piece of glass having an index of refraction of 3/2, its wavelength
 
  A) increases by a factor of 3/2.
  B) is reduced to 2/3 its original value.
  C) is unaffected.


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ApricotDream

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

Answer: D

Answer to Question 2

B


bio_gurl

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

mochi09

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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