The electric field just above the Earth's surface is known to be E = 130 N/C. (a) Assuming that this field results from a spherically symmetric charge distribution over the Earth, find the total charge Qe on the Earth. (Earth's radius R. = 6400 km.) Justify in full detail the expression that you will use in calculating the total charge. (b) Assuming that the Earth's field acts vertically, what charge q would a ball of mass m = 10 g have to have to hover in mid-air?

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Chapter1: Units, Trigonometry. And Vectors
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1. The electric field just above the Earth's surface is known to be Ee = 130 N/C. (a) Assuming that this field results
from a spherically symmetric charge distribution over the Earth, find the total charge Qe on the Earth. (Earth's
radius Re = 6400 km.) Justify in full detail the expression that you will use in calculating the total charge. (b)
Assuming that the Earth's field acts vertically, what charge q would a ball of mass m = 10 g have to have to hover
in mid-air?
Transcribed Image Text:1. The electric field just above the Earth's surface is known to be Ee = 130 N/C. (a) Assuming that this field results from a spherically symmetric charge distribution over the Earth, find the total charge Qe on the Earth. (Earth's radius Re = 6400 km.) Justify in full detail the expression that you will use in calculating the total charge. (b) Assuming that the Earth's field acts vertically, what charge q would a ball of mass m = 10 g have to have to hover in mid-air?
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