Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 24, Problem 55P
A thermally insulated container of seawater carries a uniform current density of 75 mA/cm2. How long does it take for its temperature to increase from 15°C to 20°C? Use the result of the preceding problem and any other information you might look up.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Consider a wire made of copper with conductivity 6.0 × 10' 2m', which has a circular cross-section of radius 0.47 mm. In a particular
circuit, this wire carries a current of 6.5 A.
What is the electric field, in volts per meter, inside this wire?
E =
If we replace this wire with a gold one of the same size, with conductivity 4.1 × 107 2-1'm1, what will the electric field in the wire be?
E =
In a given fluid, positive ions, each with 2 excess protons, move to the right at a steady rate of 1.0 x 1019 ions per minute and negative ions, each
with 4 excess electrons, move to the left at a rate of 3,6 × 1019
unit of charge to be 1.6x 10-19 C. Determine the current (in amperes) to the right.
ions per minute. Determine the current directed to the right. Use the fundamental
An electric current of I = 0.266 A runs though a wire. How many electrons flow past a particular point in the wire in a time of t = 191 seconds? Express your answer in scientific notation using the "e" format, and keep 3 significant figures.
Chapter 24 Solutions
Essential University Physics (3rd Edition)
Ch. 24.1 - Prob. 24.1GICh. 24.2 - Two wires carry the same current I. Wire A has a...Ch. 24.3 - Prob. 24.3GICh. 24.4 - You put a variable resistance across a battery...Ch. 24.5 - Todays power tools are often cordless, powered by...Ch. 24 - Explain the difference between current and current...Ch. 24 - A constant electric field generally produces a...Ch. 24 - When caught in the open in a lightning storm, a...Ch. 24 - Good conductors of electricity are often good...Ch. 24 - Why can current persist forever in a...
Ch. 24 - Does an electric stove burner draw more current...Ch. 24 - A person and a cow are standing in a field when...Ch. 24 - You put a 1.5-V battery across a piece of...Ch. 24 - Prob. 9FTDCh. 24 - A 50-W and a 100-W lightbulb are both designed to...Ch. 24 - Equation 24.8a suggests that no power can be...Ch. 24 - Whats wrong with this news report: A power-line...Ch. 24 - A wire carries 1.5 A. How many electrons pass...Ch. 24 - A 12-V car battery is rated at 80 ampere-hours,...Ch. 24 - Biologists measure the total current due to...Ch. 24 - The National Electrical Code specifies a maximum...Ch. 24 - The electric field in an aluminum wire is 85 mV/m....Ch. 24 - What electric field is necessary to drive a 7.5-A...Ch. 24 - Prob. 19ECh. 24 - A 1.0-cm-diameter rod carries a 50-A current when...Ch. 24 - Use Table 24.1 to determine the conductivity of...Ch. 24 - Find the resistance of a heating coil that draws...Ch. 24 - Prob. 23ECh. 24 - Whats the current in a 47-k resistor with 110 V...Ch. 24 - The third rail that carries electric power to a...Ch. 24 - What current flows when a 45-V potential...Ch. 24 - A uniform wire of resistance R is stretched until...Ch. 24 - A cars starter motor draws 125 A with 11 V across...Ch. 24 - A 4.5-W flashlight bulb draws 750 mA. (a) At what...Ch. 24 - A watch uses energy at the rate of 240 W. What...Ch. 24 - A 35- electric stove burner consumes 1.5 kW of...Ch. 24 - An incandescent lightbulb draws 0.50 A, while a...Ch. 24 - Though rare, electrocution has been reported under...Ch. 24 - You touch a defective appliance while standing on...Ch. 24 - You have a typical resistance of 100 k. (a) How...Ch. 24 - An ion channel in a cell membrane carries 2.4 pA...Ch. 24 - A lightbulb filament has diameter 0.050 mm and...Ch. 24 - A gold film in an integrated circuit measures 1.85...Ch. 24 - A copper wire joins an aluminum wire whose...Ch. 24 - Prob. 40PCh. 24 - In a study of proteins mediating cell membrane...Ch. 24 - Theres a 2.5-V potential difference between...Ch. 24 - The maximum safe current in 12-gauge...Ch. 24 - Silver and iron wires of the same length and...Ch. 24 - You have a cylindrical piece of material 2.4 cm...Ch. 24 - How must the diameters of copper and aluminum wire...Ch. 24 - Youre writing the instruction manual for a power...Ch. 24 - An implanted pacemaker supplies the heart with 72...Ch. 24 - A solid rectangular iron bar measures 0.50 cm by...Ch. 24 - Each pulse produced by the Taser described in the...Ch. 24 - The Nissan Leaf is an all-electric car powered by...Ch. 24 - An electric heater is tested by immersing it in...Ch. 24 - Magnetic effects involving Jupiters moon Io result...Ch. 24 - At a particular point in a material with...Ch. 24 - A thermally insulated container of seawater...Ch. 24 - Youre heading out for spring break, but your car...Ch. 24 - Two cylindrical resistors are made from the same...Ch. 24 - Youre working on a new high-speed rail system. It...Ch. 24 - A 100%-efficicnt electric motor is lifting a 15-N...Ch. 24 - A power plant produces 1000 MW to supply a city 40...Ch. 24 - Youre estimating costs for a new power line with...Ch. 24 - A 240-V electric motor is 90% efficient, meaning...Ch. 24 - A metal bar has rectangular cross section 5.0 cm...Ch. 24 - An immersion-type heating coil is connected to a...Ch. 24 - The resistivity of copper as a function of...Ch. 24 - Each atom in aluminum contributes about 3.5...Ch. 24 - Prob. 67PCh. 24 - Figure 24.20 shows a truncated cone of material...Ch. 24 - The current density in a particle beam with...Ch. 24 - Prob. 70PCh. 24 - You work for an automobile manufacturer developing...Ch. 24 - During the brownout, the current in conductors...Ch. 24 - Which of the following occurs in the conductors of...Ch. 24 - During the brownout, the power dissipated in...Ch. 24 - Prob. 75PP
Additional Science Textbook Solutions
Find more solutions based on key concepts
Express the unit vectors in terms of (that is, derive Eq. 1.64). Check your answers several ways Also work o...
Introduction to Electrodynamics
Suppose you throw a rock nearly straight up at a coconut in a palm tree and the rock just misses the coconut on...
University Physics Volume 1
The partial pressure of carbon dioxide in the lungs is about 470 Pa when the total pressure in the lungs is 1.0...
University Physics Volume 2
30. Power rating of a resistor. The power rating of a resistor is the maximum power it can safety dissipate wit...
College Physics (10th Edition)
5.93 Two objects, with masses 5.00 kg and 2.00 kg, hang 0.600 m above the floor from the ends of a cord that is...
University Physics (14th Edition)
47. A 1000 kg sports car accelerates from 0 to 30m/sin 10 s. What is the average power of the engine?
College Physics: A Strategic Approach (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 1. (OpenStax, Ch. 9, problem #25) The quantity of charge through a conductor is modeled as Q = 4.00* – - 1.00ºt + 6.00mC What is the current at time t = 3.00s? R1 E1 E2 R2 Parrow_forwardConductors permit the flow of electric current, while insulators block such flow. That simple concept becomes more difficult when multiple layers of material are involved. For a continuous path through such a compound material to be electrically conductive, the path must contain only conductors. This is a multiple answer question. Please answer with more than one response. Part (a) In part A, a piece of copper is sandwiched between two pieces of plastic. This is a simple model of electrical wiring. Check all answers that apply. The path from point A to point B is electrically conductive. The path from point B to point D is electrically conductive. The path from point A to point C is electrically conductive. The path from point A to point D is electrically conductive.arrow_forwardCalculate the drift velocity (in m/s) of electrons in a 6 gauge copper wire (which has a diameter of 4.115 mm) carrying a 22.9 A current, given that there is one free electron per copper atom. The density of copper is 8.80 x 10³ kg/m³. (Indicate the direction with the sign of your answer.) 0.000128859 X m/sarrow_forward
- While tracking the speed of individual particles is great, a more useful and simpler quantity to measure is current which is the amount of charges moving through some cross-sectional area per unit time. It has units of Coulombs per second (or Amps} and is abbreviated by the symbol i. See if you can write out a formula for the current through a section of wire with cross sectional area A given the average speed of particles v, the charge on each particle, q, and the number of charges per unit volume, n. Use dimensional analysis for this formula. Which of the terms in your formula do you think the electric field can influence?arrow_forwardA conducting fluid is contained in the space between two concentric spherical electrodes. (A two-dimensional sketch of this three-dimensional apparatus is shown below.) The inner electrode has a diameter of 1 cm and the outer electrode has a diameter of 3 cm. The current flowing between the electrodes is 2 A. Calculate the current density at both electrodes.arrow_forward(1) What is a definition of electric current? Label the variables. (2) Suppose that 1016 electrons pass through a cross-section of a wire each second. What is the current in the wire? (3) The current in a wire varies with time according to the relation / = 5+3t where I is in amperes andt is in seconds. What is the number of coulombs of charge that pass a cross section of the wire between t=3s and t=5s?arrow_forward
- The current price of gold costs $58,887.31 per kilogram while silver costs $864.19 per kilogram. The density of gold is 19.32 [g]/[cm]^3 while silver is 10.49 [g]/[cm]^3. A)If you desired to create electrical wires that are both 10 [m] long, how thick or thin would the gold wire be compared to the silver wire if you desired for them to have the same electrical resistance? (i.e. - find the difference in diameters.) B)Given the situation in part a, how much more would the gold wire cost in comparison to the silver wire?arrow_forwardIn a given fluid, positive ions, each with 1 excess protons, move to the right at a steady rate of 1.7 × 1019 ions per minute and negative ions, each with 4 excess electrons, move to the left at a rate of 3.5 × 1019 ions per minute. Determine the current directed to the right. Use the fundamental unit of charge to be 1.6 × 10-19 C. Determine the current (in amperes) to the rightarrow_forwardConsider a wire made of copper with conductivity 6.0 × 107 £¯¹m³¹, which has a circular cross-section of radius 0.56 mm. In a particular circuit, this wire carries a current of 4.5 A. What is the electric field, in volts per meter, inside this wire? If we replace this wire with a gold one of the same size, with conductivity 4.1 × 107 ¹m-¹, what will the electric field in the wire be?arrow_forward
- A beam of doubly charged negative ions with a number density of 2.7 × 10^18 cm−3 is traveling north with a speed of 1.0 × 10^5 m/s. What are the (a) magnitude and (b) direction of the current density? The question states 2.7, however the solution is stating 2. This is incorrect. What is the correct solution?arrow_forwardThe total amount of charge that has entered a wire at time tt is given by the expression Q=(20C)(1−e−t/(2.0s)), where t is in seconds and t≥0. 1.Find an expression for the current in the wire at time t. Assume the numeric values in your entry are in SI units. 2.What is the maximum value of the current? Express your answer to two significant figures and include the appropriate units.arrow_forwardDirection: Solve the problem as directed. Write your answers on this answer sheet. (1) A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 x 1028 electrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Circuits, Voltage, Resistance, Current - Physics 101 / AP Physics Review with Dianna Cowern; Author: Physics Girl;https://www.youtube.com/watch?v=q8X2gcPVwO0;License: Standard YouTube License, CC-BY