What is the approximate electric force between the droplets? ?
Falling raindrops frequently develop electric charges. Does this create noticeable forces between the droplets? Suppose two 1.8 mg drops each have a charge of +21 pC. The centers of the droplets are at the same height and 0.44 cm apart.
(A) What is the approximate electric force between the droplets?
(B) What horizontal acceleration does this force produce on the droplets?
- NCSLv 72 months agoFavorite Answer
A) electrostatic force
F = kQq / d²
where k = 1/4πε₀ = 8.99e9N·m²/C²
F = 8.99e9N·m²/C² * (21e-12 C)² / (0.0044m)²
F = 2.05e-7 N
B) a = F / m = 2.05e-7N / 1.8e-6kg = 0.11 m/s²
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