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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
1.80Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Force in a soap bubble **
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Like the charged rubber balloon described at the end of Section 1.14,
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a charged soap bubble experiences an outward electrical force on every bit of its surface. Given the total charge Q on a bubble of radius R, what is the magnitude of the resultant force tending to pull any hemispherical half of the bubble away from the other half? (Should this force divided by 2Ï€ R exceed the surface tension of the soap film, interesting behavior might be expected!)
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1.81Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Energy around a sphere *
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A sphere of radius R has a charge Q distributed uniformly   over
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its surface. How large a sphere contains 90 percent of the energy stored in the electrostatic field of this charge distribution?
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