Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

$\bullet$ $\bullet$ Particles in a gold ring. You have a pure $(24-$ karat) goldring with mass 17.7 g. Gold has an atomic mass of 197 g/moland an atomic number of 79 . (a) How many protons are in thering, and what is their total positive charge? (b) If the ring car-ries no net charge, how many electrons are in it?

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

a) $4.2817 \times 10^{24}$ protonsb) $N_{\text { clatrons }}=4.2817 \times 10^{24}$ electrons.

Physics 102 Electricity and Magnetism

Chapter 17

Electric Charge and Electric Field

Gauss's Law

Electric Potential

Fredwill K.

May 3, 2022

Chapter 21 Answers

University of Washington

Simon Fraser University

University of Winnipeg

McMaster University

Lectures

13:02

In physics, potential energy is the energy possessed by a body or a system due to its position relative to others, stresses within itself, electric charge, and other factors. The unit for energy in the International System of Units (SI) is the joule (J). One joule is the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre). The term potential energy was introduced by the 19th century Scottish engineer and physicist William Rankine, although it has links to Greek philosopher Aristotle's concepts of potentiality. Potential energy is associated with forces that act on a body in a way that the work done by these forces on the body depends only on the initial and final positions of the body, and not on the specific path between them. These forces, that are called potential forces, can be represented at every point in space by vectors expressed as gradients of a scalar function called potential. Potential energy is the energy of an object. It is the energy by virtue of a position relative to other objects. Potential energy is associated with restoring forces such as a spring or the force of gravity. The action of stretching the spring or lifting the mass is performed by a force that works against the force field of the potential. This work is stored in the field, which is said to be stored as potential energy.

18:38

In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb). The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum). The electric flux through a closed surface is zero, by Gauss's law.

02:55

Particles in a Gold Ring. …

05:35

02:06

You have a pure (24-karat…

15:35

You have a pure (24-karat)…

01:25

04:15

(II) What is the total cha…

06:57

(a) Calculate the number o…

0:00

01:07

In electrically neutral at…

04:08

problem Number seven in this problem, it is given. They're the most off the gold ring is Mm. He calls too 17 17 grams and the atomic number of gold. Is it cool? Do 79. The atomic mass off gold is given as 1 97 Gramps, but more. We know that 1 97 grams is it cool in tow? One mole off atoms. So one gram is equal to one of 11 97 wall off items. This implies that total moss off during which is 17.7 grams, is equal to 17.7 upon 1 97 molds. Off items does the whole dring contains 17.7 by 1 97 more off Adams. No. Since the atomic number off, gold is given a 79. So it means that one atom off gold compensatory np nine protons. So, as we have calculated earlier, that the ring contents 17.7 by 1 97 mall sofa item off gold. So these total Adams contain set into 79 protons. So total Amora protons and is equal to 17.7 by 197 moles into 79 protons. We know that one more is equal to six into 10 to the power guaranteed three entities. So multiplying this into 79 this gives us the total number of protons present in the living. When we solve this, we will get 4.2 five it into 10 to the power 24 protons. This is the answer that total number of protons presenting the ring is 4.258 into 10 to the power before protons. Now we have to find the total charge on that ring. We know that one proton consist of 1.6 into 10 to the power minus 19 columns. So toe find their total charge on the ring, we will multiply the number off little protons wandering by the charge of one proton, Sir, Total charge Q on the ring is equal to 1.6 into 10 to the power minus 19 into total number of protons which we have already calculated 4.258 and 2 10 to the power 23. This will give us the total charge on the ring s 6.81 to it into 10 to the power four columns. There's that total charge on the having now in that thing is electrically neutral. So the number of electrons should be called to the number of protons. Hence number off electrons. Is it cool toe 4.258 in tow. Stand toe the power 24 electrons.

View More Answers From This Book

Find Another Textbook

02:11

The electrostatic force between twocharges of one coulomb each and place…

01:59

Learning Task 5 Study the materials inside the box. Choose two materials…