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Author Question: Americium-243 has a decay constant of 9.39 10-5 years-1. How long will it take for a sample of ... (Read 27 times)

Ebrown

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on: Jul 29, 2018
Americium-243 has a decay constant of 9.39  10-5 years-1. How long will it take for a sample of americium to lose one-third of its nuclei?
 
  A) 2960 s
  B) 10.6  103 years
  C) 4.32  103 years
  D) 6.44  103 years
  E) 7.84  103 years

Question 2

A 50.0-kg block is being pushed up a 15.0 slope by a force of 300 N which is directed 30.0 below the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
 
  A) 0.164 m/s2
  B) 0.967 m/s2
  C) 1.20 m/s2
  D) 2.20 m/s2
  E) 0.528 m/s2


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wuly

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

C

Answer to Question 2

A


Ebrown

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Reply 2 on: Jul 29, 2018
:D TYSM

yeungji

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Reply 3 on: Yesterday
Excellent

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