ch22-p077 - 77(a Since E points down and we need an upward...

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4.4N | | 0.029C 150 N C Fm g q EE == = = , or 0.029 C. q =− (b) The feasibility of this experiment may be studied by using Eq. 22-3 (using k for 1/4 πε 0 ). We have 2 || / Ekqr = with 3 sulfur sphere 4 3 rm ρ ⎛⎞ π= ⎜⎟ ⎝⎠ Since the mass of the sphere is 4.4/9.8 0.45 kg and the density of sulfur is about 2.1 × 10 3 kg/m 3 (see Appendix F), then we obtain 13 sphere 11 2 sulfur 3 0.037m 2 10 N C 4 m q rE k r = × π which is much too large a field to maintain in air.
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This note was uploaded on 07/10/2010 for the course PH 213 taught by Professor Jg during the Fall '10 term at The Petroleum Institute.

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