water droplet of radius 2.8×10−2 mm remains stationary in the air. Part A If the downward-directed...

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Question

water droplet of radius 2.8×10⁻² mm remains stationary in the air.

Part A

If the downward-directed electric field of the Earth is 200 N/C , how many excess electron charges must the water droplet have?

Express your answer using two significant figures.

N

=

nothing

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