In a small lead sphere with a mass of 8.00 g are placed surplus electrons, so that its net charge is -3.20 x 10-9 C. a) Find the number of excess electrons in the sphere. b) How many excess electrons are there per atom? Excess electrons are there per lead atom? The atomic number of lead is 82, and its atomic mass is 207 g/mol.

In a small lead sphere with a mass of 8.00 g are placed surplus electrons, so that its net charge is -3.20 x 10-9 C. a) Find the number of excess electrons in the sphere. b) How many excess electrons are there per atom? Excess electrons are there per lead atom? The atomic number of lead is 82, and its atomic mass is 207 g/mol.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter23: Electric Forces

Section: Chapter Questions

Problem 15PQ: A charge of 36.3 nC is transferred to a neutral copper ball of radius 4.35 cm. The ball is not...

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A charge of 36.3 nC is transferred to a neutral copper ball of radius 4.35 cm. The ball is not grounded. The excess electrons spread uniformly on the surface of the ball. What is the number density (number of electrons per unit surface area) of excess electrons on the surface of the ball?
Initially a glass rod and a piece of silk are neutral. After you rub the silk against the rod, the glass rod has a surplus of 3.33 1011 protons. What is the charge q of the silk?
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