88. A lead ball with a density ρ1 = 11.3 ∙ 103 kg / m3 is placed in glycerin with a density ρ2 = 1.26 ∙ 103 kg / m3. Find the charge of the ball if, in a uniform electrostatic field with an intensity E = 400 kV / m, directed upwards, the ball was suspended in glycerin. Ball diameter 0.5 cm.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)