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Author Question: The radioactive half-life of a material is the time for A) half of an original quantity of the ... (Read 121 times)

lak

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on: Jul 29, 2018
The radioactive half-life of a material is the time for
 
  A) half of an original quantity of the material to decay.
  B) its decay rate to reduce to half.
  C) both of these
  D) neither of these

Question 2

A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 20.7 below the horizontal is applied to the box. The coefficient of kinetic friction between the box and the surface is 0.300.
 
  What is the acceleration of the box? A) 1.21 m/s2
  B) 1.77 m/s2
  C) 2.84 m/s2
  D) 3.54 m/s2
  E) 5.14 m/s2


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k2629

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

Answer: C

Answer to Question 2

A


lak

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Reply #2 on: Jul 29, 2018
Thank you!


k2629

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Reply #3 on: Jul 29, 2018
Always glad to help...


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