5.A Water drop of radius 2.0 micro-meters is suspended in the atmosphere where the E-field's value is 500 V/m . How many electrons are there?
9.A 120-keV electron is fired directly toward a flat large plastic sheet with a charge density of -2 micro C/m^2. From what distance must the electron be fired if it is just to fail to strike the sheet?
Showing posts with label Couldnt figure out how to approach both of these....suggestion are very appreciated thanks... Show all posts
Showing posts with label Couldnt figure out how to approach both of these....suggestion are very appreciated thanks... Show all posts
Saturday, March 6, 2010
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