Pearson eText Conceptual Integrated Science -- Instant Access (Pearson+)
3rd Edition
ISBN: 9780135626573
Author: Paul Hewitt, Suzanne Lyons
Publisher: PEARSON+
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Textbook Question
Chapter 7, Problem 37TIS
What is the likely cause of Earth's magnetic field?
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Chapter 7 Solutions
Pearson eText Conceptual Integrated Science -- Instant Access (Pearson+)
Ch. 7 - Which part of an atom is positively charged, and...Ch. 7 - What is meant by saying that charge is conserved?Ch. 7 - How is Coulombs law similar to Newtons law of...Ch. 7 - How does a coulomb of charge compare with the...Ch. 7 - Give two examples of common force fields.Ch. 7 - How is the direction of an electric field defined?Ch. 7 - In terms of the units that measure them,...Ch. 7 - A balloon may easily be charged to several...Ch. 7 - What is the difference between a conductor and an...Ch. 7 - What kinds of material are the best conductors?...
Ch. 7 - What condition is necessary for heat energy to...Ch. 7 - What condition is necessary for a sustained flow...Ch. 7 - Why do electrons, rather than protons, make up the...Ch. 7 - Distinguish between DC and AC.Ch. 7 - Which has more resistancea thick wire or a thin...Ch. 7 - What is the unit of electrical resistance?Ch. 7 - What is the effect on the current through a...Ch. 7 - How much current does a radio speaker with a...Ch. 7 - Which type of circuit is favored for operating...Ch. 7 - How does the sum of the currents through the...Ch. 7 - What is the relationship among electric power,...Ch. 7 - Considering a kilowatt and a kilowatt-hour, which...Ch. 7 - Prob. 23RCQCh. 7 - Prob. 24RCQCh. 7 - Prob. 25RCQCh. 7 - Why is iron magnetic and wood is not?Ch. 7 - Prob. 27RCQCh. 7 - What is a galvanometer? What is it called when it...Ch. 7 - What are the three ways in which voltage can be...Ch. 7 - a What is induced by the rapid alternation of a...Ch. 7 - High voltage by itself does not produce electric...Ch. 7 - What is the source of the electrons that shock you...Ch. 7 - If a current of 0.1 or 0.2 of an ampere were to...Ch. 7 - What effect does high temperature have on a common...Ch. 7 - Electric charges at rest produce an electric...Ch. 7 - People have wondered about the "mystery" of animal...Ch. 7 - What is the likely cause of Earths magnetic field?Ch. 7 - Two point charges, each with 0.1C of charge, are...Ch. 7 - A toaster has a heating element of 15 and is...Ch. 7 - When you touch your fingers resistance 1000 to the...Ch. 7 - Calculate the current in the 240 filament of a...Ch. 7 - An electric toy draws 0.5A from a 120-V outlet....Ch. 7 - Show that the power consumed by a 120-V device...Ch. 7 - The three pairs of same-size metal spheres have...Ch. 7 - Rank circuits A, B, and C according to the...Ch. 7 - The bulbs in parallel circuits A, B, and C are...Ch. 7 - Bar magnets are moved into the wire coils in...Ch. 7 - Two point charges are separated by 6cm. The...Ch. 7 - A droplet of ink in an industrial ink-jet printer...Ch. 7 - Find the voltage change a when an electric field...Ch. 7 - Rearrange this equation Current=voltageresistance...Ch. 7 - Use the formula Power=currentvoltage to find that...Ch. 7 - Show that it costs 3.36 to operate a 100-W lamp...Ch. 7 - An electric iron connected to 120V draws 9A of...Ch. 7 - When combing your hair, you scuff electrons from...Ch. 7 - The 5000 billion billion freely moving electrons...Ch. 7 - What is meant by saying that charge is conserved?Ch. 7 - Two equal charges exert equal forces on each...Ch. 7 - How does the strength of electric force between a...Ch. 7 - In what way does an electrically polarized object...Ch. 7 - A particle having a charge qcoulombs experiences a...Ch. 7 - Suppose that the strength of the electric field...Ch. 7 - What is the term given to the electric potential...Ch. 7 - Why might the wingspans of birds be a...Ch. 7 - Why is a good conductor of electricity also a good...Ch. 7 - A garden hose waters a garden. Water in a car...Ch. 7 - A hydraulic pump doesnt produce water but,...Ch. 7 - Lillian is charged to some 50,000V but is...Ch. 7 - Batteries and generators produce electric current....Ch. 7 - Which travels at nearly the speed of light in an...Ch. 7 - Which flows through an electric circuit: voltage,...Ch. 7 - Comment on the warning sign in the sketch.Ch. 7 - Which has the greater electric resistance: a wire...Ch. 7 - What is the effect on the current in a wire if the...Ch. 7 - Why can a bird safely perch on an un insulated...Ch. 7 - If a bird perched on a high-voltage wire reaches...Ch. 7 - Will the current in a light bulb connected to a...Ch. 7 - In Figure 7.24, Will uses four batteries to light...Ch. 7 - In Figure 7.25, author Paul lights three identical...Ch. 7 - As more and more bulbs are connected in a series...Ch. 7 - In the circuit shown, how does the brightness of...Ch. 7 - What unit of measurement is meant by a joule per...Ch. 7 - What happens to the brightness in a lamp of any...Ch. 7 - Why are LED bulbs more efficient than incandescent...Ch. 7 - Electric charge may be positive or negative but...Ch. 7 - Surrounding any mass is a gravitational field....Ch. 7 - In what sense is motion relevant to a magnetic...Ch. 7 - Since every iron atom is a tiny magnet, why aren't...Ch. 7 - In what relative direction between a magnetic...Ch. 7 - Prob. 97TECh. 7 - Is it correct to say that an electric motor is a...Ch. 7 - In what way did Maxwell add to the physics of...Ch. 7 - How does electromagnetic induction lead to the...Ch. 7 - When a car is moved into a painting chamber, a...Ch. 7 - You are not harmed by contact with a charged Van...Ch. 7 - Discuss the circuits shown. In which of these...Ch. 7 - Sometimes you hear someone say that a particular...Ch. 7 - Are automobile headlights wired in parallel or in...Ch. 7 - Your tutor tells you that an ampere and a volt...Ch. 7 - The circuit shown in an incandescent flashlight...Ch. 7 - A person in your discussion group says that...Ch. 7 - Another person in your discussion group says that...Ch. 7 - Still another person in your discussion group says...Ch. 7 - Can an electron at rest in a magnetic field be set...Ch. 7 - A magician places an aluminum ring on a table,...Ch. 7 - An electron and a proton a attract each other. b...Ch. 7 - When a pair of charged particles are brought twice...Ch. 7 - Surrounding every moving electron is a an electric...Ch. 7 - When you double the voltage in a simple electric...Ch. 7 - In a simple circuit consisting of a single lamp...Ch. 7 - In a circuit with two lamps in parallel if the...Ch. 7 - If both current and the voltage in a circuit are...Ch. 7 - The essential physics concept in an electric...Ch. 7 - Prob. 9RATCh. 7 - The mutual induction of electric and magnetic...
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- There are regions where the magnetic field of earth is almost perpendicular to the surface of Earth. What difficulty does this cause in the use of a compass?arrow_forwardAround the geographic North Pole (or magnetic South Pole), Earth’s magnetic field is almost vertical. If an airplane is flying northward in this region, which side of the wing is positively charged and which is negatively charged?arrow_forwardImagine you have a compass whose needle can rotate vertically as well as horizontally. Which way would the compass needle point if you were at the Earths north magnetic pole?arrow_forward
- A typical currant in a lightning bolt is 104 A. Estimate the magnetic field 1 m from the bolt.arrow_forwardIn a region of space, a magnetic field is uniform over space but increases at a constant rate. This changing magnetic field induces an electric field that (a) increases in time, (b) is conservative, (c) is in the direction of the magnetic field, or (d) has a constant magnitude.arrow_forwardThe charged currents in the outer conducting regions of the earth’s core are thought to be responsible for earth’s magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these currents?arrow_forward
- How are magnetic fields created?arrow_forwardHigh energy charged particles from out in space (these are called cosmic rays), strike Earth more at polar areas than at equatorial areas. Use your understanding of magnetism (in details) to explain why this happens.arrow_forwardExplain the Earth's Magnetic poles in terms of the geographic poles and how a compass works.arrow_forward
- Magnetic field lines run.... east to west west to east south to north north to southarrow_forwardList three sources of magnetic fields.arrow_forwardThe relationship between electricity and magnetism can be seen in all of the following EXCEPT:A) a battery converts chemical energy into electrical energyB) a magnet pushed inside a loop of wire produces current in the wireC) a compass needle is deflected when placed near a current carrying wireD) electric current set up in a coil of wire affects another coil placed near the first onearrow_forward
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THE BAR MAGNET; Author: 7activestudio;https://www.youtube.com/watch?v=DWQfL5IJTaQ;License: Standard YouTube License, CC-BY