EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
6th Edition
ISBN: 9780134091983
Author: Hewitt
Publisher: PEARSON CO
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Textbook Question
Chapter 9, Problem 14RCQ
What relative direction between a magnetic field and a current-carrying wire results in the greatest force on the wire? In the smallest force?
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Steel train rails are laid in 13.0-m-long segments
placed end to end. The rails are laid on a winter
day when their temperature is -6.0° C.
Part A
How much space must be left between adjacent rails if they are just to touch on a summer day when their
temperature is 32.0°C?
Express your answer with the appropriate units.
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If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is
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Part A
In an effort to stay awake for an all-night study
session, a student makes a cup of coffee by first
placing a 200 W electric immersion heater in
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How much heat must be added to the water to raise its temperature from 20.5° C to 95.0°C?
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Chapter 9 Solutions
EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
Ch. 9 - How does the range of refrigerator magnets differ...Ch. 9 - Prob. 2RCQCh. 9 - Prob. 3RCQCh. 9 - Prob. 4RCQCh. 9 - What two kinds of motion are exhibited by...Ch. 9 - What is a magnetic domain?Ch. 9 - Why is iron magnetic and wood not magnetic?.Ch. 9 - Prob. 8RCQCh. 9 - What happens to the direction of the magnetic...Ch. 9 - Why is the magnetic field strength inside a...
Ch. 9 - How is the strength of the magnetic field in a...Ch. 9 - In what direction relative to a magnetic field...Ch. 9 - What effect does Earths magnetic field have on the...Ch. 9 - What relative direction between a magnetic field...Ch. 9 - Prob. 15RCQCh. 9 - What is a galvanometer called when it is...Ch. 9 - Is it correct to say that an electric motor is a...Ch. 9 - What important discovery did physicists Michael...Ch. 9 - State Faradays law.Ch. 9 - What are the three ways in which voltage can be...Ch. 9 - How does the frequency of induced voltage compare...Ch. 9 - What are the basic differences and similarities...Ch. 9 - Is the current that is produced by a common...Ch. 9 - What commonly supplies the energy input to a...Ch. 9 - Is it correct to say that a generator produces...Ch. 9 - Is it correct to say that a transformer boosts...Ch. 9 - Which of these does a transformer change: voltage,...Ch. 9 - What is induced by the rapid alternation of a...Ch. 9 - What is induced by the rapid alternation of an...Ch. 9 - What important connection did Maxwell discover...Ch. 9 - PLUG AND CHUG (FORMULA FAMILIARIZATION)...Ch. 9 - PLUG AND CHUG (FORMULA FAMILIARIZATION)...Ch. 9 - A video game console requires 6 V to operate...Ch. 9 - A model electric train requires 6 V to operate....Ch. 9 - A transformer for a laptop computer converts a...Ch. 9 - Show that if the output current for the...Ch. 9 - A transformer has an input of 6 V and an output of...Ch. 9 - An ideal transformer has 50 turns in its primary...Ch. 9 - Neon signs require about 12,000 Y for their...Ch. 9 - A power of 100 kW (105W) is delivered to the other...Ch. 9 - Bar magnets are moved into the wire coils in...Ch. 9 - Each of the transformers shown below powered with...Ch. 9 - Many dry cereals are fortified with iron, which is...Ch. 9 - If you place a chunk of iron near the north pole...Ch. 9 - How do the magnetic poles of refrigerator magnets...Ch. 9 - Prob. 50ECh. 9 - What kind of force field surrounds a stationary...Ch. 9 - Prob. 52ECh. 9 - All atoms have moving electric charges. Why, they...Ch. 9 - Will either pole of a magnet attract a paper clip?...Ch. 9 - A friend tells you that aluminum lies beneath the...Ch. 9 - Magnet A has twice the magnetic field strength of...Ch. 9 - Prob. 57ECh. 9 - To make a compass point an ordinary iron nail...Ch. 9 - Nails sticking to a magnet is understandable. But...Ch. 9 - When steel naval ships are built, the location of...Ch. 9 - How do force field lines for gravitation about a...Ch. 9 - Can an electron at rest in a magnetic field be set...Ch. 9 - When a current-carrying wire is placed in a strong...Ch. 9 - Two charged particles are projected into a...Ch. 9 - In Figure 9.17, we see a magnet exerting a force...Ch. 9 - Residents of northern Canada are bombarded by more...Ch. 9 - When doing spacewalks, why do astronauts keep to...Ch. 9 - What changes in cosmic-ray intensity at Earths...Ch. 9 - Prob. 69ECh. 9 - Historically, replacing dirt roads with paved...Ch. 9 - A common pickup for on electric guitar consists of...Ch. 9 - When Tim pushes the wire between the poles of the...Ch. 9 - At the airport security area you walk through a...Ch. 9 - If your metal car moves over a wide, closed loop...Ch. 9 - Two separate but similar coils of wire are mounted...Ch. 9 - Why will more voltage be induced with the...Ch. 9 - Why is a generator armature harder to rotate when...Ch. 9 - Does a cyclist coast farther if the headlamp...Ch. 9 - How do the input and output parts of a generator...Ch. 9 - Your friend says that if you crank the shaft of a...Ch. 9 - Correct the statement that a generator produces...Ch. 9 - Discuss what is wrong with the following scheme:...Ch. 9 - What is wrong with the statement that a very...Ch. 9 - Why will a transformer not work in a dc circuit?Ch. 9 - What is the principal difference between a step-up...Ch. 9 - In what sense can a transformer be viewed as an...Ch. 9 - Can an efficient transformer step up energy?...Ch. 9 - A friend says that changing electric and magnetic...Ch. 9 - Would electromagnetic waves exist if changing...Ch. 9 - Your physics instructor drops a magnet through a...Ch. 9 - This exercise is similar to the previous one. Why...Ch. 9 - Discuss why a motor also tends to act as a...Ch. 9 - Both the English physicist Michael Faraday and the...Ch. 9 - One method for making a compass is to stick a...Ch. 9 - Your lab partner says, An electron always...Ch. 9 - In a mass spectrometer, ions are directed into a...Ch. 9 - A cyclotron is a device for accelerating charged...Ch. 9 - A beam of high-energy protons emerges from a...Ch. 9 - A magnetic field can deflect a beam of electrons,...Ch. 9 - When Fred Cauthen releases the sheet of copper,...Ch. 9 - A piece of plastic tape coated with iron oxide is...Ch. 9 - If you place a metal ring in a region where a...Ch. 9 - How could a light bulb near an electromagnet, but...Ch. 9 - Why can a hum usually be heard when a transformer...Ch. 9 - Prob. 105DQCh. 9 - A magician places an aluminum ring on a table,...Ch. 9 - Do a pair of parallel current-carrying wires exert...Ch. 9 - Choose the BEST way to complete the statement. 1....Ch. 9 - Surrounding moving electric charges are (a)...Ch. 9 - Prob. 3RATCh. 9 - A magnetic force acting on a beam of electrons can...Ch. 9 - When you move a bar magnet to and fro, first...Ch. 9 - The principle underlying the operation of an...Ch. 9 - The essential physics concept in the operation of...Ch. 9 - A transformer works in accordance with (a)...Ch. 9 - A step-up transformer in an electric circuit can...Ch. 9 - Prob. 10RAT
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