Conceptual Integrated Science
3rd Edition
ISBN: 9780135197394
Author: Hewitt, Paul G., LYONS, Suzanne, (science Teacher), Suchocki, John, Yeh, Jennifer (jennifer Jean)
Publisher: PEARSON EDUCATION (COLLEGE)
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Chapter 7, Problem 31TIS
High voltage by itself does not produce electric shock. What does?
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If you work out enough to visibly increase the diameter of your biceps, will this increase or decrease your susceptibility to electric shock? Explain.
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15 V
B
A circuit that is capacitive in nature always means that it contains only capacitors.
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Chapter 7 Solutions
Conceptual Integrated Science
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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- The immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls Clear! and pushes a button on one paddle to discharge the capacitor through the patient's chest Assume an energy of 3.00 102 W s is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forwardWhy is it possible for a bird to sit on a high-voltage wire without being electrocuted?arrow_forwardThe immediate cause of many deaths is ventricular fibrillation, which is an uncoordinated quivering of the heart. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart sometimes resumes its proper beating. One type of defibrillator (chapter-opening photo, page 777) applies a strong electric shock to the chest over a time interval of a few milliseconds. This device contains a capacitor of several microfarads, charged to several thousand volts. Electrodes called paddles are held against the chest on both sides of tire heart, and the capacitor is discharged through the patient's chest. Assume an energy of 300 J is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forward
- Why is a golfer with a metal dub over her shoulder vulnerable to lightning in an open fairway? Would she be any safer under a tree?arrow_forwardIn places such as hospital operating rooms or factories for electronic circuit boards, electric sparks must be avoided. A prison standing on a grounded floor and touching nothing else can typically have a body capacitance of 150 pF, in parallel with a foot capacitance of 80.0 pF produced by the dielectric soles of his or her shoes. The person acquires static electric charge from interactions with Ills or her surroundings. The static charge flows to ground through the equivalent resistance of the two shoe soles in parallel with each other. A pair of rubber-soled street shoes can present an equivalent resistance of 5.00 103 M. A pair of shoes with special static-dissipative soles can have an equivalent resistance of 1.00 M. Consider the persons body and shoes as forming an RC circuit with the ground. (a) How long does it take the rubber-soled shoes to reduce a persons potential from 3.00 103 V to 100? (b) How long does it take the static-dissipative shoes to do the same thing?arrow_forwardWhat Hall voltage is produced by a 0.200T field applied across a 2.60-cm-diameter aorta when blood velocity is 60.0 cm/s?arrow_forward
- What is the capacitance of a large Van de Graaff generator’s terminal, given that it stores 8.00 mC of charge at a voltage of 12.0 MV?arrow_forwardWhen working with high-power electric circuits, it is advised that whenever possible, you work "one-handed” or “keep one hand in your pocket." Why is this a sensible suggestion?arrow_forwardAccording to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 32.0 F between two points A and B. When one circuit is being constructed, the inexpensive but durable capacitor installed between these two points is found to have capacitance 34.8 F. To meet the specification, one additional capacitor can be placed between the two points. (a) Should it be in series or in parallel with the 34.8-F capacitor? (b) What should be its capacitance? (c) What If? The next circuit comes down the assembly line with capacitance 29.8 F between A and B. To meet the specification, what additional capacitor should be installed in series or in parallel in that circuit?arrow_forward
- While taking a bath, a person touches the metal case of a radio. The path through the person to the drainpipe and ground has a resistance of 4000- . What is the smallest voltage on the case of the radio that could cause ventricular fibrillation?arrow_forwardThe temperature near the center of the Sun is thought to be 15 million degrees Celsius ( 1.5107oC ) (or kelvin). Through what voltage must a singly charged ion be accelerated to have the same energy as the average kinetic energy of ions at this temperature?arrow_forwardYou have been given the circuit in the image. . The switch was closed a long time ago and the capacitor was also fully charged. After the switch is opened the potential difference across the capacitor decreases to 25 percent of its initial value after: A) 0.46s B) 1.7s C) 2.2 s D) 2.8s E) 3.3sarrow_forward
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