EP CONCEPTUAL INTEGRATED SCIENCE-ACCESS
3rd Edition
ISBN: 9780135213346
Author: Hewitt
Publisher: PEARSON CO
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Chapter 7, Problem 63TE
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Chapter 7 Solutions
EP CONCEPTUAL INTEGRATED SCIENCE-ACCESS
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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- An electron is to be accelerated in a uniform electric field having a strength of 2.00106 V/m. (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?arrow_forwardReview. From a large distance away, a particle of mass m1, and positive charge q1 is fired at speed in the positive x direction straight toward a second particle, originally stationary but free to move, with mass m2, and positive charge q2. Both particles are constrained to move only along the x axis. (a) At the instant of closest approach, both particles will be moving at the same velocity. Find this velocity, (b) Find the distance of closest approach. After the interaction, the particles will move far apart again. At this time, find the velocity of (c) the particle of mass m1, and (d) the particle of mass m2.arrow_forwardAn electron is to be accelerated in a uniform electric field having a strength of 2.00106 V/m. (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?arrow_forward
- You are working on a research project in which you must control the direction of travel of electrons using deflection plates. You have devised the apparatus shown in Figure P22.28. The plates are of length = 0.500 m and are separated by a distance d = 3.00 cm. Electrons are fired at vi = 5.00 106 m/s into a uniform electric field from the left edge of the lower, positive plate, aimed directly at the right edge of the upper, negative plate. Therefore, if there is no electric field between the plates, the electrons will follow the broken line in the figure. With an electric field existing between the plates, the electrons will follow a curved path, bending downward. You need to determine (a) the range of angles over which the electron can leave the apparatus and (b) the electric field required to give the maximum possible deviation angle. Figure P22.28arrow_forwardReview. From a large distance away, a particle of mass 2.00 g and charge 15.0 C is fired at 21.0 m/s straight toward a second particle, originally stationary but free to move, with mass 5.00 g and charge 8.50 C. Both particles are constrained to move only along the x axis. (a) At the instant of' closest approach, both particles will be moving at the same velocity. F'ind this velocity. (b) Find the distance of closest approach. After the interaction, the particles will move far apart again. At this time, find the velocity of (c) the 2.00-g particle and (d) the 5.00-g particle.arrow_forwardThe 5000 billion billion (5 × 1021) freely moving electrons in a penny repel one another. Why don’t they fly out of the penny?arrow_forward
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- A proton (m=1.67 x 10^-27 kg) travels a distance of 4.3 cm parallel to a uniform electric field 3.5 x 10^5 V/m between the plates shown in the figure. If the initial velocity is 3.2 x 10^5 m/s, find the magnitude of its final velocity in m/s. (Ignore gravity)arrow_forwardTwo protons, initially separated by a very large distance (ri is infinity), move directly toward each other with the same initial speed vi. e=1.6×10−19C,k=9.0∗109Nm2/C2,m=1.67×10−27kg. Determine their initial speeds if the distance of the closest approach when their speeds are zero is 8.0×10−14 m .arrow_forwardSay you have two protons which are 1m apart. The mass of a proton is, m_p = 1.67 * 10^-27 kg and charge is, q p= 1.6 * 10^-19 C. Newton's constant, G N= 6.67 * 10^-11 N m^2 kg^-2 and Coulomb constant, k = 8.987 * 10^9 N m^2 C^-2. Calculate this ratio: Gravitational force between the protons / Electrostatic force between the protons. What can you conclude from this?arrow_forward
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