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Modern Physics 2nd edition Krane

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Pupil
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Date Posted: 7/24/2008 2:41:01 AM  Status: Live
Modern Physics 2nd edition Krane
Course Textbook Chapter Problem
General Physics Modern Physics (2nd) by Krane 2 29
Question Details:
Find the kinetic energy of an electron moving at a speed of (a) v= 1.00 * 10-4c
(b) v =1.00 * 10-2c
(c) v= .300c
(d) v=.999c
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Date Posted: 7/24/2008 3:28:07 AM  Status: Live
Asker's Rating: Helpful   
Response:
me = 9.11 x 10-31 kg
 
c = 3 x 108m/s
 
a) KE= 1/2mv2 = 1/2(9.11x10-31kg)(1.00x10-4 * 3x108 m/s)2 = [4.10x10-22 J]
 
b) KE = 1/2(9.11x10-31)(1x10-2 * 3x108)2 = [4.1 x 10-18J]
 
c) KE = 1/2(9.11x10-31)(.3 * 3x108)2 = [3.69 x 10-15 J]
 
d) KE = 1/2 (9.11x10-31)(.999 * 3x108)2 = [4.09 x 10-14 J]
 
Hope this helps!
 
JTK's Comment:
Thank You

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Date Posted: 7/24/2008 3:52:44 AM  Status: Live
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Response:
thank You



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