/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q10CQ Brass is a metal consisting prin... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 10: Q10CQ (page 466)

Brass is a metal consisting principally of copper alloyed with a smaller amount of zinc, whose atoms do not alternate in a regular pattern in the crystal lattice but are somewhat randomly scattered about. The resistivity of brass is higher than that of either copper or zinc at room temperature, and it drops much slower as the temperature is lowered. What do these behaviors tell us about electrical conductivity in general?

Short Answer

Expert verified

Conductivity grows slowly as the temperature falls, unlike copper or zinc.

Step by step solution

01

Concept:

The valence electron becomes a free electron and thus the metal can conduct electricity. Thus, the electrical conductivity of copper increases with increasing temperature because the electrical conductivity of a metal is caused by the movement of electrons.

02

Step 2: Electrical conductivity:

Collisions between electrons and positive ions do not generate resistance in metals. Instead, the variation from regularity disrupts the electron wave, determining the metal's resistance. Brass, which is made up of atoms that do not alternate in a regular manner, has a far higher resistance than copper or zinc. This is due to the regular crystal pattern of copper or zinc.

The resistance of a metal increases as temperature rises and reduces as the temperature falls due to the vibration of the positive ions in the metal. The resistivity of brass is caused by flaws in the metal and is nearly temperature independent. As a result, as the temperature is dropped, the resistance of brass gradually diminishes. As a result, compared to copper or zinc, its conductivity rises slowly as the temperature decreases.

Hence, conductivity grows slowly as the temperature falls, unlike copper or zinc.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

From the diagrams in Figure 7.15and the qualitative behavior of the wave functions they represent, argue that a combination of the2pZ(i.e.,ml=0) and the negative of the 2swould produce a function that sticks out preferentially in the positive Zdirection. This is known as a hybridspstate.

Question: The photons emitted by an LED arise from the energy given up in electron-hole recombinations across the energy gap. How large should the energy gap be to give photons at the red end of the visible spectrum (700nm) ?

For the four kinds of crystal binding 鈥� covalent, ionic, metallic, and molecular- how would the destiny of valence electrons vary throughout the solid? Would it be constant, centered on the atoms, or largest between the atoms? Or would it alternate, with a net charge density positive at one atom and negative at the next?

Why does the small current flowing through a reverse biased diode depends much more strongly on temperature than on the applied (reverse) voltage?

Electron affinity is a property specifying the "appetite" of an element for gaining electrons. Elements, such as fluorine and oxygen that lack only one or two electrons to complete shells can achieve a lower energy state by absorbing an external electron. For instance, in uniting an electron with a neutral chlorine atom, completing its n = 3 shell and forming a CI ion, 3.61 eV of energy is liberated. Suppose an electron is detached from a sodium atom, whose ionization energy is 5.14 eV.Then transferred to a (faraway) chlorine atom.

(a) Must energy on balance be put in by an external agent, or is some energy actually liberated? If so How much?

(b) The transfer leaves the sodium with a positive charge and the chlorine with a negative. Energy can now be extracted by allowing these ions to draw close forming a molecule. How close must they approach to recover the energy expended in part (a)?

(c)The actual separation of the atoms in a NaCl molecule is 0.24 nm. How much lower in energy is the molecule than the separated neutral atoms?

See all solutions

Recommended explanations on Physics Textbooks

Electricity and Magnetism

Read Explanation

Energy Physics

Read Explanation

Rotational Dynamics

Read Explanation

Solid State Physics

Read Explanation

Modern Physics

Read Explanation

Electromagnetism

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.