A small piece of dust mass18 mu g travels horizontally, Ask an Expert

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A small piece of dust (mass=1.8 \(\mu\)\ g) travels horizontally through an electric air cleaner in which the electric field is 524 N/C. the electric force on the particle is equal to the weight of the particle.

a) What is the charge on the dust particle?

b) if this charge is provided by an excess of electrons, how many electrons does that correspond to?

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