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Author Question: Suppose you start with 1 kilogram of a radioactive substance that has a half-life of 10 years. Which ... (Read 185 times)

ARLKQ

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on: Jul 27, 2018
Suppose you start with 1 kilogram of a radioactive substance that has a half-life of 10 years. Which of the following statements will be true after 20 years pass?
 
  A) All the material will have completely decayed.
  B) You'll have 0.75 kilogram of the radioactive substance remaining.
  C) You'll have 0.25 kilogram of the radioactive substance remaining.
  D) You'll have 0.5 kilogram of the radioactive substance remaining.

Question 2

________ waves cannot travel through the Earth's liquid outer core.
 
  Fill in the blank(s) with correct word


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AaaA

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

C

Answer to Question 2

S


ARLKQ

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Reply 2 on: Jul 27, 2018
Gracias!

diana chang

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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