89. A droplet of mercury is weighed in the space between the horizontal plates of a flat air condenser. Determine the radius r of this droplet if its charge is Q = 1 nC, and the electrostatic field strength of the capacitor is E = 105 V / m. Mercury density ρ = 13.6 g / cm3.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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