How many excess electrons does she get?A person scuffing her feet on a wool rug on a dry dayaccumulates a net charge of -40 µCExpress your answer using two significant figures.N =electronsSubmitRequest AnswerPart BBy how much does her mass increase?Express your answer using two significant figures.HAAm =ValueUnitsSubmitRequest AnswerProvide Feedback

A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -40 uC . Q = - 40…

Answered: How many excess electrons does she get?…

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 9PQ: A 50.0-g piece of aluminum has a net charge of +4.20 C. Aluminum has an atomic mass of 27.0 g/mol,...

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Similar questions

Suppose Earth and the Moon each carried a net negative charge Q . Approximate both bodies as point masses and point charges. (a) What value of Q is required to balance the gravitational attraction between Earth and the Moon? (b) Does the distance between Earth and the Moon affect your answer? Explain. (c) How many electrons would be needed to produce this charge?
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?
A glass rod is initially neutral. After it is rubbed with silk, its charge is 45.7 C. a. Has the rod gained or lost mass? Explain. b. How much mass has the rod gained or lost?
Protons in an atomic nucleus ale typically 1015 m apart. What is the electric fore of repulsion between nuclear protons?
An electron with charge e and mass m moves in a circular orbit of radius r around a nucleus of charge Ze, where Z is the atomic number of the nucleus. Ignore the gravitational force between the electron and the nucleus. Find an expression in terms of these quantities for the speed of the electron in this orbit.
The probability of fusion occurring is greatly enhanced when appropriate nuclei are brought close together, but mutual Coulomb repulsion must be overcome. This can be done using the kinetic energy of high- temperature gas ions or by accelerating the nuclei toward one another. (a) Calculate the potential energy of two singly charged nuclei separated by 1.001012. (b) At what temperature will atoms of a gas have an average kinetic energy equal to this needed electrical potential energy?
Suppose a speck of dust in an electrostatic precipitator has l.0000 1012 protons in it and has a net charge of5.00 nC (a very large charge for a small speck). How many electrons does it have?
An electron is to be accelerated in a uniform electric field having a strength of 2.00106 V/m. (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?
An object has a charge of 35 nC. How many excess protons does it have?
A 2.5-g copper penny is given a charge of 4.0109C . (a) How many electrons ale removed from the penny? (b) If no more than one electron is removed from an atom, what percent of the atoms are ionized by this charging process?
What are the signs of the charges on the particles in Figure 22.46?
In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles (nuclei of helium atoms) from thin sheets of gold. An alpha particle, having charge +2e and mass 6.64 10-27 kg, is a product of certain radioactive decay's. The results of the experiment led Rutherford to the idea that most of an atoms mass is in a very small nucleus, with electrons in orbit around it. (This is the planetary model of the atom, which well study in Chapter 42.) Assume an alpha particle, initially very far from a stationary gold nucleus, is fired with a velocity of 2.00 107 m/s directly toward the nucleus (charge +79e). What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction? Assume the gold nucleus remains stationary.

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