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Unformatted text preview: HPHY 253 Homework 23a Electric Fields: Distributions of Point Charges Dr. A. E. Bak Name 1. Serway & Jewett Problem 23 : 3 . Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arms length from each other and each person had 1% more electrons than protons, then the force of repulsion between them would be enough to lift a weightequal to that of the entire Earth. Carry out an order-of-magnitude calculation to substantiate this assertion. 2. Serway & Jewett Question 23 : 7 . A charged particle is at the origin of coordinates. The particle produces an electric eld of 4 e x kN= C at the point with position vector 36 e x cm . i. At which position does the eld have the value 1 e x kN= C ? ( a ) 9 e x cm ; ( b ) 18 e x cm ; ( c ) 72 e x cm ; ( d ) 144 e x cm ; ( e ) nowhere : Choose from these possibilities. ii. At which position does the eld have the value 16 e x kN= C ? Choose from the possibilities presented in part i ....
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This note was uploaded on 05/01/2011 for the course HPHY 253 taught by Professor Bak during the Spring '09 term at Morehouse.
- Spring '09