Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Question
Chapter 26, Problem 16P
(a)
To determine
The amount of iron in 1.00 mole
(b)
To determine
The molar density of iron.
(c)
To determine
The number density of iron atoms.
(d)
To determine
The number density of two conduction iron atoms.
(e)
To determine
The drift speed of the conduction electrons.
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An iron wire has a cross-sectional area equal to 5.50 x 10-6 m². Carry out the following steps to determine the drift speed of the conduction electrons in the wire
if it carries a current of 12.0 A.
(a) How many kilograms are there in 1.00 mole of iron?
0.055
kg/mol
(b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter).
1.43163
X
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mol/m³
(c) Calculate the number density of iron atoms using Avogadro's number.
atoms/m³
(d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom.
electrons/m³
(e) Calculate the drift speed of conduction electrons in this wire.
m/s
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A 0.68-mm-diameter copper wire carries a tiny current of 2.5 μA. The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m^3. NA=6.02×10^23
Estimate the electron drift velocity. Assume one free electron per atom.
Express your answer to two significant figures and include the appropriate units.
vd=
An iron wire has a cross-sectional area equal to 4.00 x 10-6 m2. Carry out the following steps to determine the drift speed of the
conduction electrons in the wire if it carries a current of 36.0 A.
(a) How many kilograms are there in 1.00 mole of iron?
kg/mol
(b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of
iron per cubic meter).
|mol/m3
(c) Calculate the number density of iron atoms using Avogadro's number.
| atoms/m3
(d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom.
electrons/m3
(e) Calculate the drift speed of conduction electrons in this wire.
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Chapter 26 Solutions
Physics for Scientists and Engineers
Ch. 26.1 - Consider positive and negative charges of equal...Ch. 26.2 - Prob. 26.2QQCh. 26.2 - Prob. 26.3QQCh. 26.4 - When does an incandescent lightbulb carry more...Ch. 26 - Prob. 1PCh. 26 - A small sphere that carries a charge q is whirled...Ch. 26 - In the Bohr model of the hydrogen atom (which will...Ch. 26 - Prob. 4PCh. 26 - Prob. 5PCh. 26 - Figure P26.6 represents a section of a conductor...
Ch. 26 - The quantity of charge q (in coulombs) that has...Ch. 26 - A Van de Graaff generator (see Problem 24)...Ch. 26 - An electric current in a conductor varies with...Ch. 26 - Prob. 10PCh. 26 - An electric heater carries a current of 13.5 A...Ch. 26 - You are working at a company that manufactures...Ch. 26 - Prob. 13PCh. 26 - Prob. 14PCh. 26 - Prob. 15PCh. 26 - Prob. 16PCh. 26 - Prob. 17PCh. 26 - Prob. 18PCh. 26 - An aluminum wire with a diameter of 0.100 mm has a...Ch. 26 - Plethysmographs are devices used for measuring...Ch. 26 - At what temperature will aluminum have a...Ch. 26 - You are working in a laboratory that studies the...Ch. 26 - Assume that global lightning on the Earth...Ch. 26 - The Van de Graaff generator, diagrammed in Figure...Ch. 26 - A 100-W lightbulb connected to a 120-V source...Ch. 26 - The potential difference across a resting neuron...Ch. 26 - The cost of energy delivered to residences by...Ch. 26 - Residential building codes typically require the...Ch. 26 - Assuming the cost of energy from the electric...Ch. 26 - An 11.0-W energy-efficient fluorescent lightbulb...Ch. 26 - A 500-W heating coil designed to operate from 110...Ch. 26 - Why is the following situation impossible? A...Ch. 26 - Make an order-of-magnitude estimate of the cost of...Ch. 26 - Lightbulb A is marked 25 W 120 V, and lightbulb B...Ch. 26 - One wire in a high-voltage transmission line...Ch. 26 - You are working with an oceanographer who is...Ch. 26 - A charge Q is placed on a capacitor of capacitance...Ch. 26 - An experiment is conducted to measure the...Ch. 26 - Prob. 39APCh. 26 - Prob. 40APCh. 26 - Review. An office worker uses an immersion heater...Ch. 26 - The strain in a wire can be monitored and computed...Ch. 26 - A close analogy exists between the flow of energy...Ch. 26 - The dielectric material between the plates of a...Ch. 26 - Review. A parallel-plate capacitor consists of...Ch. 26 - Prob. 46APCh. 26 - Why is the following situation impossible? An...Ch. 26 - Prob. 48CPCh. 26 - A spherical shell with inner radius ra and outer...Ch. 26 - Material with uniform resistivity is formed into...
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