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Anonymous asked in Science & MathematicsPhysics · 2 months ago

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?

1 Answer

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  • NCS
    Lv 7
    2 months ago
    Favorite Answer

    A) electrostatic force

    F = kQq / d²

    where k = 1/4πε₀ = 8.99e9N·m²/C²

    so here

    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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