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Author Question: Fermium-253 has a half-life of 3.00 d. A sample of fermium contains 7.37 107 nuclei. How long will ... (Read 38 times)

SAVANNAHHOOPER23

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on: Jul 29, 2018
Fermium-253 has a half-life of 3.00 d. A sample of fermium contains 7.37  107 nuclei. How long will it take for there to be only 3.36  106 fermium nuclei in this sample?
 
  A) 2.75 d
  B) 9.80 d
  C) 13.4 d
  D) 15.7 d
  E) 58.6 d

Question 2

A person's hyperopic (farsighted) eye can focus on objects that are 75 cm away and farther. What power and what focal length contact lenses should be prescribed so this person can see objects 25 cm and farther from the eye?
 
  What will be an ideal response?


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akpaschal

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

C

Answer to Question 2

2.7 diopters, 38 cm


SAVANNAHHOOPER23

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Reply 2 on: Jul 29, 2018
Wow, this really help

nguyenhoanhat

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

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