College PhysicsOER 2016 EditionOpenStax Publisher: OpenStax CollegeISBN: 9781947172173
College Physics
Solutions for College Physics
Problem 1CQ:
Can a wire carry a current and still be neutral-that is, have a total charge of zero? Explain.Problem 2CQ:
Car batteries are rated in ampere-hours (A h ). To what physical quantity do ampere-hours...Problem 3CQ:
If two different wires having identical cross-sectional areas carry the same current, will the drift...Problem 4CQ:
Why are two conducting paths from a voltage source to an electrical device needed to operate the...Problem 5CQ:
In cars, one battery terminal is connected to the metal body. How does this allow a single wire to...Problem 6CQ:
Why isn't a bird sitting on a high-voltage power line electrocuted? Contrast this with the situation...Problem 7CQ:
The IR drop across a resistor means that there is a change in potential or voltage across the...Problem 8CQ:
How is the I R drop in a resistor similar to the pressure drop in a fluid flowing through a pipe?Problem 9CQ:
In which of the three semiconducting materials listed in Table 20.1 do impurities supply free...Problem 11CQ:
If aluminum and copper wires of the same length have the same resistance, which has the larger...Problem 12CQ:
Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as...Problem 13CQ:
Why do incandescent lightbulbs grow dim late in their lives, particularly just before their...Problem 14CQ:
The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance...Problem 15CQ:
Give an example of a use of AC power other than in the household. Similarly, give an example of a...Problem 16CQ:
Why do voltage, current, and power go through zero 120 times per second for 60-Hz AC electricity?Problem 17CQ:
You are riding in a train, gazing into the distance through its window. As close objects streak by,...Problem 18CQ:
Using an ohmmeter, a student measures the resistance between various points on his body. He finds...Problem 19CQ:
What are the two major hazards of electricity?Problem 20CQ:
Why isn’t a short circuit a shock hazard?Problem 21CQ:
What determines the severity of a shock? Can you say that a certain voltage is hazardous without...Problem 22CQ:
An electrified needle is used to burn off warts, with the circuit being completed by having the...Problem 23CQ:
Some surgery is performed with high-voltage electricity passing from a metal scalpel through the...Problem 24CQ:
Some devices often used in bathrooms, such as hairdryers, often have safety messages saying “Do not...Problem 25CQ:
We are often advised to not flick electric switches with wet hands, dry your hand first. We are also...Problem 26CQ:
Before working on a power transmission line, linemen will touch the line with the back of the hand...Problem 27CQ:
Why is the resistance of wet skin so much smaller than dry, and why do blood and other bodily fluids...Problem 29CQ:
In view of the small currents that cause shock hazards and the larger currents that circuit breakers...Problem 32CQ:
Explain the properties of myelinated nerves in terms of the insulating properties of myelin.Problem 1PE:
What is the current in milliamperes produced by the solar cells of a pocket calculator through which...Problem 2PE:
A total of 600 C of charge passes through a flashlight in 0.500 h. What is the average current?Problem 3PE:
What is the current when a typical static charge of 0.250 C moves from your finger to a metal...Problem 4PE:
Find the current when 2.00 nC jumps between your comb and hair over a 0.500-s time interval.Problem 5PE:
A large lightning bolt had a 20,000-A current and moved 30.0 C of charge. What was its duration?Problem 6PE:
The 200-A current through a spark plug moves 0.300 mC of charge. How long does the spark last?Problem 8PE:
During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. The...Problem 9PE:
(a) A defibrillator passes 12.0 A of current through the torso of a person for 0.0100 s. How much...Problem 10PE:
A clock battery wears out after moving 10,000 C of charge through the clock at a rate of 0.500 mA....Problem 11PE:
The batteries of a submerged non-nuclear submarine supply 1000 A at full speed ahead. How long does...Problem 12PE:
Electron guns are used in X-ray tubes. The electrons are accelerated through a relatively large...Problem 13PE:
A large cyclotron directs a beam of He ++ nuclei onto a target with a beam current of 0.250 mA. (a)...Problem 14PE:
Repeat the above example on Example 20.3, but for a wire made of silver and given there is one free...Problem 15PE:
Using the results of the above example on Example 20.3, find the drift velocity in a copper wire of...Problem 16PE:
A 14-gauge copper wire has a diameter of 1.628 mm. What magnitude current flows when the drift...Problem 18PE:
What current flows through the bulb of a 3.00-V flashlight when its hot resistance is 3.60 O ?Problem 19PE:
Calculate the effective resistance of a pocket calculator that has a 1.35-V battery and through...Problem 20PE:
What is the effective resistance of a car’s starter motor when 150 A flows through it as the car...Problem 21PE:
How many volts are supplied to operate an indicator light on a DVD player that has a resistance of...Problem 22PE:
(a) F ind the voltage drop in an extension cord having a 0.0600-O resistance and through which 5.00...Problem 23PE:
A power transmission line is hung from metal towers with glass insulators having a resistance of...Problem 24PE:
What is the resistance of a 20.0-m-long piece of 12-gauge copper wire having a 2.053-mm diameter?Problem 25PE:
The diameter of 0-gauge copper wire is 8.252 mm. Find the resistance of a 1.00-km length of such...Problem 26PE:
If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200at...Problem 27PE:
Find the ratio of the diameter of aluminum to copper wire, if they have the same resistance per unit...Problem 28PE:
What current flows through a 2.54-cm-diameter rod of pure silicon that is 20.0 cm long, when 1,00 ...Problem 29PE:
(a) To what temperature must you raise a copper wire, originally at 20.0°C, to double its...Problem 30PE:
A resistor made of Nichrome wire is used in an application where its resistance cannot change more...Problem 31PE:
Of what material is a resistor made if its resistance is 40.0% greater at 100°C than at 20.0°C ?Problem 32PE:
An electronic device designed to operate at any temperature in the range from -10.0°C to 55.0°C...Problem 33PE:
a) Of what material is a wire made, if it is 25.0 m long with a 0.100 mm diameter and has a...Problem 34PE:
Assuming a constant temperature coefficient of resistivity, what is the maximum percent decrease in...Problem 35PE:
A wire is drawn through a die, stretching it to four times its original length. By what factor does...Problem 36PE:
A copper wire has a resistance of 0.500at 20.0°C, and an iron wire has a resistance of 0.525at the...Problem 37PE:
(a) Digital medical thermometers determine temperature by measuring the resistance of a...Problem 38PE:
Integrated Concepts (a) Redo Exercise 20.25 taking into account the thermal expansion of the...Problem 39PE:
Unreasonable Results (a) To what temperature must you raise a resistor made of constantan to double...Problem 41PE:
What power is supplied to the starter motor of a large truck that draws 250 A of current from a...Problem 43PE:
How many watts does a flashlight that has 6.00102C pass through it in 0.500 h use if its voltage is...Problem 44PE:
Find the power dissipated in each of these extension cords: (a) an extension cord having a 0,0600...Problem 49PE:
Electrons in an X-ray tube are accelerated through 1 .00 102 kV and directed toward a target to...Problem 51PE:
With a 1200-W toaster, how much electrical energy is needed to make a slice of toast (cooking time =...Problem 52PE:
What would be the maximum cost of a CFL such that the total cost (investment plus operating) would...Problem 53PE:
Some makes of older cars have 6.00-V electrical systems. (a) What is the hot resistance of a 30.0-W...Problem 54PE:
Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of...Problem 55PE:
A cauterizer, used to stop bleeding in surgery, puts out 2.00 mA at 15.0 kV. (a) What is its power...Problem 56PE:
The average television is said to be on 6 hours per day. Estimate the yearly cost of electricity to...Problem 57PE:
An old lightbulb draws only 50.0 W, rather than its original 60.0 W, due to evaporative thinning of...Problem 58PE:
-gauge copper wire has a diameter of 9.266 mm. Calculate the power loss in a kilometer of such wire...Problem 60PE:
Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a...Problem 61PE:
Integrated Concepts What current must be produced by a 12.0-V battery-operated bottle warmer in...Problem 62PE:
Integrated Concepts How much time is needed for a surgical cauterizer to raise the temperature of...Problem 65PE:
Integrated Concepts A light-rail commuter train draws 630 A of 650-V DC electricity when...Problem 66PE:
Integrated Concepts (a) An aluminum power transmission line has a resistance of 0.0580/km. What is...Problem 67PE:
Integrated Concepts (a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 102...Problem 68PE:
Integrated Concepts (a) What is the cost of heating a hot tub containing 1500 kg of water from...Problem 69PE:
Unreasonable Results (a) What current is needed to transmit 1.00 102MW of power at 480 V? (b) What...Problem 70PE:
Unreasonable Results (a) What current is needed to transmit 1.00 102 MW of power at 10.0kV? (b)...Problem 71PE:
Construct Your Own Problem Consider an electric immersion heater used to heat a cup of water to make...Problem 72PE:
(a) What is the hot resistance of a 25-W light bulb that runs on 120-V AC? (b) If the bulb’s...Problem 73PE:
Certain heavy industrial equipment uses AC power that has a peak voltage of 679 V. What is the rms...Problem 74PE:
A certain circuit breaker trips when the rms current is 15.0 A. What is the corresponding peak...Problem 75PE:
Military aircraft use 400-Hz AC power, because it is possible to design lighter-weight equipment at...Problem 76PE:
A North American tourist takes his 25.0-W, 120-V AC razor to Europe, finds a special adapter, and...Problem 77PE:
In this problem, you will verify statements made at the end of the power losses for Example 20.10....Problem 78PE:
A small office-building air conditioner operates or 408-V AC and consumes 50.0 kW. (a) What is its...Problem 81PE:
Two different electrical devices have the same power consumption, but one is meant to be operated on...Problem 82PE:
Nichrome wire is used in some radiative heaters. (a) Find the resistance needed if the average power...Problem 83PE:
Find the time after t = 0 when the instantaneous voltage of 60-Hz AC first reaches the following...Problem 84PE:
(a) At what two times in the first period following t = 0 does the instantaneous voltage in 60-Hz AC...Problem 85PE:
(a) Haw much power is dissipated in a short circuit of 240-V AC through a resistance of 0.250 ? (b)...Problem 87PE:
Find the current through a person and identify the likely effect on her if she touches a 120-V AC...Problem 88PE:
While taking a bath, a person touches the metal case of a radio. The path through the person to the...Problem 89PE:
Foolishly trying to fish a burning piece of bread from a toaster with a metal butter knife, a man...Problem 90PE:
(a) During surgery, a current as small as 20.0 ? applied directly to the heart may cause ventricular...Problem 91PE:
(a) What is the resistance of a 220-V AC short circuit that generates a peak power of 96.8 kW? (b)...Problem 92PE:
A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore...Problem 93PE:
Integrated Concepts A short circuit in a 120-V appliance cord has a 0.500- resistance. Calculate the...Browse All Chapters of This Textbook
Chapter 1 - Introduction: The Nature Of Science And PhysicsChapter 2 - KinematicsChapter 3 - Two-dimensional KinematicsChapter 4 - Dynamics: Force And Newton's Laws Of MotionChapter 5 - Further Applications Of Newton's Laws: Friction, Drag, And ElasticityChapter 6 - Gravitation And Uniform Circular MotionChapter 7 - Work, Energy, And Energy ResourcesChapter 8 - Linear Momentum And CollisionsChapter 9 - Statics And TorqueChapter 10 - Rotational Motion And Angular Momentum
Chapter 11 - Fluid StaticsChapter 12 - Fluid Dynamics And Its Biological And Medical ApplicationsChapter 13 - Temperature, Kinetic Theory, And The Gas LawsChapter 14 - Heat And Heat Transfer MethodsChapter 15 - ThermodynamicsChapter 16 - Oscillatory Motion And WavesChapter 17 - Physics Of HearingChapter 18 - Electric Charge And Electric FieldChapter 19 - Electric Potential And Electric FieldChapter 20 - Electric Current, Resistance, And Ohm's LawChapter 21 - Circuits, Bioelectricity, And Dc InstrumentsChapter 22 - MagnetismChapter 23 - Electromagnetic Induction, Ac Circuits, And Electrical TechnologiesChapter 24 - Electromagnetic WavesChapter 25 - Geometric OpticsChapter 26 - Vision And Optical InstrumentsChapter 27 - Wave OpticsChapter 28 - Special RelativityChapter 29 - Introduction To Quantum PhysicsChapter 30 - Atomic PhysicsChapter 31 - Radioactivity And Nuclear PhysicsChapter 32 - Medical Applications Of Nuclear PhysicsChapter 33 - Particle PhysicsChapter 34 - Frontiers Of Physics
Sample Solutions for this Textbook
We offer sample solutions for College Physics homework problems. See examples below:
Chapter 1, Problem 1CQChapter 2, Problem 1CQGiven: The given figure is, Figure (1) Formula used: The velocity of particle is given as, v=ΔxΔt...Chapter 3, Problem 1CQGiven: The given table is, Height (m)Time...Chapter 4, Problem 1CQChapter 5, Problem 1CQChapter 6, Problem 1CQChapter 7, Problem 1CQ
Given: Distance traveled with rocket engine firing ( m)Payload final velocity (...Chapter 8, Problem 1CQGiven: The mass of the girl is m=40 kg. The mass of the platform is m=120 kg. The initial speed of...Introduction: An experiment can be performed in which the two carts will be placed on a straight...Given: The mass of puck A is mA=200 g. The mass of puck B is mB=800 g. Formula used: The initial...Given: Mass of A, ma=3m. Mass of B, mb=m. Velocity of mass A before collision, ua=12 m/s. Velocity...Given: Velocity of object A before collision, ua=4 m/s. Velocity of object B before collision, ub=−8...Given: The positions of two objects before and after collision are depicted in the following figure....Given: Mass of A is ma=1.0 kg. Mass of B is mb=3.0 kg. Initial velocity of mass A is ua=8 m/s....Given: Mass of A is ma=1.0 kg. Mass of B is mb=1.0 kg. Initial velocity of mass A is ua=4 m/s....Given: Let the mass of A be m1. The mass m2 of B is m2=2m1. The initial velocity of mass B is...Given: The mass A is moving in +x direction with an initial velocity, v1=15 m/s. The mass of B is,...Given: The mass of car A is, m1=2000 kg. The initial velocity of car A is, v1=38 m/s in the east...Chapter 9, Problem 1CQGiven: The mass of the bridge is, m=2500 kg. Formula used: The relation between the mass and weight...Given: The mass of the bridge is M=2500 kg. The mass of the car is m=900 kg. The distance of weight...Given: The mass of the woman is m1=50 kg. The acceleration due to gravity is g=9.8 m/s2. Formula...Given: Number of bricks in the wheel barrow is 20. Mass of each brick is 3 kg. Formula used: Write...Given: The weight of the dumbbell is w1=20 lb. Formula used: The relation between the mass and...Chapter 10, Problem 1CQChapter 11, Problem 1CQGiven info: The manometer along balloon and jar is shown below: Height of the liquid inside the...Given: Mass of brace, mb=150 kg Mass of load, ml=400 kg Formula used: The Force for the slave...Given info: The radius of volleyball increases by 10%. Formula used: Density is mass per unit volume...Given: Density of water, Volume of liquid, Formula Used: A polystyrene cube floating partially...Chapter 12, Problem 1CQGiven: Diameter of pipe =3.5cm Force= 320 N Rate of flowing water = 2.5m/s Pumped water level = 21m...Chapter 13, Problem 1CQChapter 14, Problem 1CQChapter 15, Problem 1CQChapter 16, Problem 1CQChapter 17, Problem 1CQGiven: The distance between bat and insect is 3.00 m. The temperatures at which echo times is to be...Given: Refer Table [17.8] The value of acoustic impedance of transducer material is, Zt=30.8×106...Given: The frequency of the car's horn is fhorn=200 Hz. Formula used: The expression for the...Given: The data length of an air column and a resonant frequency present when the column is struck...Chapter 18, Problem 1CQGiven: Point charges located at 1.00 cm, 5.00 cm, 8.00 cm and 14.0 cm along the x -axis. Formula...Given: Point charges located at 3.00, 8.00 and 11.0 cm along the x -axis. Formula used: Electric...Given: Four charges qa, qb, qc, qd placed at each corner of the square with side 5 cmhaving...Given: qb=+10.00μC qc=−5.00μC Side of an equilateral triangle 25.0 cm Formula used: E=Ebcosφ...Given: qa=+2.50 nC qb=−8.00 nC qc=+1.50 nC Point charges located at the corners of an equilateral...Formula used: The magnitude of the electrostatic force between two electrons isgiven by: FC=kq2r2...Introduction: The lines of forces are imaginary which signify amplitude and direction of an electric...Chapter 19, Problem 1CQGiven info: Charges q1=1 μCq2=−2 μCq3=3 μC Formula used: The potential energy is given by PE=−kq1q2d...Given: The charge of the particle is identical, that is, q=q. The impact of the second particle on...Chapter 20, Problem 1CQGiven: WireLengthDiameterWire 12m1cmWire 21m0.5 cmWire 31m1cm Formula used: Resistance in the wire...Given information: The given statement is a switch has a variable resistance that is nearly zero...Given information: The given figure is Introduction: Kirchhoff's junction rule states that the sum...Given information: The given figure is Formula used: Kirchhoff's second rule states that in a closed...Given information: The given figure is Introduction: Ammeter is connected in series in the circuit...Given information: The given figure is Introduction: Kirchhoff's second rule states that in a closed...Given information: The given figure is Concept Introduction: Kirchhoff's second rule states that in...Given information: The voltage of alkaline cell is 1.585 V. An internal resistance is 0.100Ω....Given information: Figure shows how a bleeder resistor is used to discharge a capacitor after an...Given: Parallel combination of two 20 Ω and one 10 Ω resistors is connected in series with a 4Ω...Chapter 22, Problem 1CQGiven: Current carrying wire is placed at the vertices of an equilateral triangle of side 10.0 cm=...Given: A pendulum is set up so that its bob swings between the poles of permanent magnet. Charge on...Chapter 23, Problem 1CQGiven information: An ideal step-up transformer with turn ratio 1:30 is supplied with an input power...Chapter 24, Problem 1CQChapter 25, Problem 1CQChapter 26, Problem 1CQChapter 27, Problem 1CQIntroduction: The resultant amplitude of two waves with equal amplitude is given by A2=2A12(1+cosδ)...Given: The nth -order diffraction angle for the longest wavelength is, θl1=53.13°. The longest...Chapter 28, Problem 1CQGiven: The Relativistic energy is E, Themomentum is p, The rest mass is m0 The speed of light is c....Chapter 29, Problem 1CQChapter 30, Problem 1CQGiven: The wavelength of first photon is λ1=121.6 nm. The wavelength of second photon is λ2=102.6...Given: The energy of the level 2 is E2=−3.4 eV. The energy of the level 3 is E3=−1.5 eV. Formula...Chapter 31, Problem 1CQChapter 32, Problem 1CQIntroduction: The formation of one or more different atomic nuclei and the subatomic particles by...Given: The reaction of nuclear fission is n01+U92235→U92236→B56141a +Ky92r + x n01 Formula Used: An...Chapter 33, Problem 1CQChapter 34, Problem 1CQ
More Editions of This Book
Corresponding editions of this textbook are also available below:
COLLEGE PHYSICS (OER)
1st Edition
ISBN: 9781947172012
COLLEGE PHYSICS
2nd Edition
ISBN: 9781711470832
COLLEGE PHYSICS
13th Edition
ISBN: 2810014673880
College Physics for AP Courses
1st Edition
ISBN: 9781630181871
College Physics
1st Edition
ISBN: 9781938168048
College Physics For Ap® Courses
16th Edition
ISBN: 9781938168932
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