A Tiny 00250-µG Oil Drop Containing 15 Excess Electrons Is Suspended Between

question 7

Short Answer

A tiny 0.0250-µg oil drop containing 15 excess electrons is suspended between two horizontally closely-spaced metal plates that carry equal but opposite charges on their facing surfaces. The plates are both circular with a radius of 6.50 cm. (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C², e = 1.6 × 10^-19
C)
(a) How much excess charge must be on each plate to hold the oil drop steady?
(b) Which plate must be positive, the upper one or the lower one?

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Definitions:

Innate Ability

A natural talent or skill that a person is born with.

Active Listening

The practice of giving full attention to a speaker, understanding their message, and responding thoughtfully.

Own Biases

Own biases are the preset inclinations or prejudices an individual holds towards other people, objects, or ideas, often unconsciously influencing their perceptions and decisions.

Listening for Feelings

Paying attention to and understanding the emotions or sentiments expressed by someone, beyond just the words spoken.