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Energy lost from sphere due to spark

  • #1
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1. Homework Statement


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Homework Equations




The Attempt at a Solution


I did this :
1/2 (2.7x10^-6)(150x10^3) - 1/2 (1.575x 10^-6)(75x10^3) =0.143 J
But the answer is 0.15 , where did I did wrong?
 
Last edited:

Answers and Replies

  • #2
I think it is: [(1/2) x (2.7x150) - (1/2) x (1.35x75)]x10^-3 = 0.152 J
 
  • #3
I think it is: [(1/2) x (2.7x150) - (1/2) x (1.35x75)]x10^-3 = 0.152 J
Oh whoops, I read off the point wrongly, thanks!
 

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