# Chapter 33 electric fields and potential exercises to lose weight – Section 1 Measuring Electric Fields: Practice Problems

## Chapter 9 Angular Motion in a Plane.

Chapter Assessment: Mixed Review

Complete the following mathematical equation for a lever.

Express your answer in joules and kilocalories.

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How much charge is on one plate of the capacitor? What power is produced? Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge What is the cost of operating this air conditioner 3. Chapter Assessment: Writing in Physics

Level 2 a. How far apart are the plates? The bumper cushions the shock by absorbing the force over a distance. Q is tripled c. Related documents. Want to cite, share, or modify this book?

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Work done to lift his body can be omitted because it is not considered useful output here. Esercises You apply a potential difference of V between two parallel plates that are 0. What is the magnitude of the electric field between the two plates shown in Figure 12? What is the size of the electric potential difference between the two points? The nucleus of a lead atom has a charge of 82 protons. Assume Michelson used a rotating octagon with a mirror on each face of the octagon. Body fat is metabolized, supplying 9.

If the spring is compressed 7. What is that potential difference? Unreasonable Results A car advertisement claims that its kg car accelerated from rest to Chapter Assessment: Mixed Review Field Lines How can you tell which charges are positive and which are negative by examining the electric field lines?

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How much work is done to transfer 0. A V battery does J of work transferring charge. What is the difference between electric potential energy and electric potential difference? These proportions neglect the mass of bulk and nondigestible materials consumed.

Note that point b overlaps point m, and also points c and l overlap. Integrated Concepts An elevator olse with passengers has a mass of kg. One object charges a second object by contact. There are no free electrons to migrate through the insulating material. They are a disturbance that moves through the air. When landing after a spectacular somersault, a

Potential Difference What is the difference between electric potential energy and electric potential difference? If there were an excess of positive or negative charges, then that excess would be distributed between the two spheres based on the relative areas until the two spheres had the same potential.

The scale exerts an upward force on him equal to its reading. Chapter 20 First Law of Thermodynamics.

What is the electric potential difference, in volts, between the plates? You would divide the force by the strength of the test charge, so the results would be the same.

Figure 7.

Radiation caused by a magnetic field accelerating a charged particle perpendicular to its velocity is called synchrotron radiation in honor of its importance in these machines. The is a practically infinite reservoir for electric charge. Include a free-body diagram in your solution. This work increases the PE of the spring. List the two things that determine the period of a pendulum.

What type of movement could be caused by this force? Read and Understand What information are you given? The loaded cart has a mass of The second object is a good conductor.

Chapter 28 Equivalent Resistance Simple Circuits. Will the tension be the same everywhere in the rope? Calculate the force she must exert if her deceleration is 7. The unit of work is the joule.

Discuss why exercise is necessary but may not be sufficient to cause a person to lose weight.

In a Van de Graaff generator, as electrons leak off the belt and onto the conducting sphere, the electric field inside the sphere steadily increases in magnitude. Chapter 39 Optical Instruments.

Challenge You place a small sphere with a net charge of 5.

How much work can this battery do before it needs to be energized again? A car advertisement claims that its kg car accelerated from rest to

Bow waves form a V-shaped wake in back of the moving source. Standing waves can form in both transverse and longitudinal waves. Lightning can occur as an potenrial discharge between the clouds and the oppositely charged ground below. The equation for calculating the speed of a wave does not apply to light waves. It can be transformed from one form into another, but the total amount of energy never changes. This clever arrangement allows the successive addition of electric potential energy and so greater particle energies are possible than in a Van de Graaff. BuecheEugene Hecht.

The KE and PE of a block freely sliding down a ramp are shown in only one place in the sketch. Remember me on this computer. Large nuclei, however, have sizes greater than the range of the strong nuclear force. What are the three ways objects can become electrically charged?

An oil drop carries one excess electron and weighs 6. To answer this question, potentiwl the following steps. Challenge You suspend a positively charged oil drop that weighs 1. What forces are acting on the oil drop, regardless of its acceleration? A charged rubber rod that is placed on a table maintains its charge for some time.

Suppose a person shoveling a footpath metabolizes food at the rate of W. What is the magnitude of the electric field at the location of the charge?

The first child exerts a force of

Electric potential difference is the work done per unit charge to move a charge in an electric field.

They occur midway between nodes.

The direction of an electric field at any point, by convention, is the direction of the electrical force on a small negative test charge, placed at that point.

The unit of work is the joule. Bow waves form a V-shaped wake in back of the moving source. This is reasonable because the car is lifted 10 m. Fieldd the tension be the same everywhere in the rope? If you ignore friction, how does the energy of the bob at the highest points of its path compare to the energy at the lowest point of its path? What force is necessary to produce this deceleration? If a rubber rod is rubbed by a piece of fur, the rubber becomes negatively charged and the fur becomes positively charged.

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What is a sonic boom? You lift two identical books one meter above the ground. If the weigjt of a wave between two crests passes the pole each second, what is the speed of the wave? They form when a half wavelength or a multiple of a half wavelength fits exactly into the length of the vibrating medium. A shorter pendulum swings with a greater frequency. Complete the following mathematical equation for a lever. They extend radially from the charge.

You also estimate the average wavelength is about 25 m. Circle ootential letter of each statement about antinodes that is true. Define semiconductor. The absence of an electric field comes about because free electrons within the conductor stop moving when the electric field is zero. A cleaner pushes a 4. For this situation, draw a free-body diagram and write the net force equation.

## Accelerators Create Matter from Energy

Skip to main content. Phuc Truong. A can of soup has a mass of 0. Circle each letter that describes something a machine can do.

Indicate on your free-body diagram the system of interest used to solve each part. Chapter 31 Sources of Magnetic Fields. They are a disturbance that moves through the air. Then calculate the tension in the cable. All pendulums swing at the same rate. The composite waveforms as they pass through each other and interfere are shown at 1-second intervals. Instead, there is a rearrangement of the positions of charges within the atoms and molecules.

Level 1 c. Suppose that you place a 2. Slectric 7. Also consider why the same person can descend stairs at a faster rate for a nearly unlimited time in spite of the fact that very similar forces are exerted going down as going up. Complete Table 2 using your understanding of electric fields. Charge Sharing If you touch a large, positively charged, conducting sphere with a small, negatively charged, conducting sphere, what can be said about the a.

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The electric field that is 0. She does work in both directions. Figure 7. How much work would it take to move an additional 0.

How much work is done to move a proton 25 cm through that field? How should you adjust the potential difference between the conducting plates to bring the drop back into balance? The What is the magnitude of the charge? A V battery does J of work transferring charge.

Add this document to collection s. She does work in both directions. Assume no friction acts on poential wagon. Two unlike-charged oil drops are held motionless in a Millikan oil-drop experiment at the same time. The What is its average power output in watts and horsepower if this takes 7.

The Crab Nebula see Figure 7. Study lib. A negative charge of 2. Also assume the light reflects from one mirror travels to the other mountain, reflects off of a fixed mirror on that mountain, and returns to the rotating mirrors.

Electric fields can also be described by using field lines or lines of force. Describe the simple model of the atom proposed in the early s by Rutherford and Bohr. And how much speed a falling object acquires in this time? Discussion A voltage of this magnitude is not difficult to achieve in a vacuum.

To determine the magnitude of the field, divide the magnitude of the force on the test charge by the magnitude of the exercsies charge. What does the area under the graph line represent? If there were an equal number of positive and negative charges electric fields and the spheres before touching, capter both spheres would be neutral after touching. Would you measure the same forces at the same place with the two test charges? What happens to the strength of an electric field when the magnitude of the test charge is halved? The bumper cushions the shock by absorbing the force over a distance. Mountain Scene You can see an image of a distant mountain in a smooth lake just as you can see a mountain biker next to the lake because light from each strikes the surface of the lake at about the same angle of incidence and is reflected to your eyes.

Draw an arrow representing the force on charge Z. What is the magnitude of the electric field exerted on the test charge shown in Figure 4? Write a brief explanation that you could use to explain this concept to a friend who does not understand the relationship between the two concepts. Rank the following Calculate the work done by an One such room has a capacitance of 6. Challenge You are probing the electric field of a charge of unknown magnitude and sign.

What are the three ways objects can become electrically charged? Compare this with the tension in the vertical strand find their ratio. In a field lines representation of an electric field, the field is weaker where the lines are farther apart. Circle the letter of each statement that is true. Explain the principle of a synchrotron.

Integrated Concepts A kg basketball player crouches down 0.

Electric potential is electrical potential energy per charge. Yes, the distance increased by a factor of 4, so the force should decrease by a factor of 4 squared, or

Carefully sketch each of the following: Level 1 a.

He was awarded the Nobel Prize in Physics for the cyclotron and nuclear activations, and he has an element and two major laboratories named for him. Significant Figures.

An oil drop weighs 1. Their masses could be different. What electric potential difference exists across a 5. Confirm the value given for the kinetic energy of an aircraft carrier in Table 7. Discuss why it is still advantageous to get a running start in very competitive events.

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The maximum friction that the brakes of a car can supply is nearly the same whether the car moves slowly or quickly. Calculate the average acceleration of the shell in the tube as it goes fiepds zero to the velocity found in a. What is the magnitude of the force the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is kg? Your completed diagram should be similar to Figure Some people get mixed up between force and pressure. Describe what causes lightning to occur during thunderstorms. The forces of attraction and repulsion on opposite sides of the paper cancel.

Chapter 31 Sources of Magnetic Fields. The AC voltage applied to the tubes is timed so that it adds to the energy in each gap. Calculate the force she must exert if her deceleration is 7. Since an electric field has both magnitude and direction, it is a vector quantity. Chapter 23 Sound.

Lawrence — Power equals work done divided by time interval. It changes to heat in the machinery due to friction.

What does the slope of weighf line represent? Find the average power required to energize the capacitor in this time. Field Versus Force How does the electric field at a test charge differ from the force on that charge? Do not include the power produced to accelerate his body. An electron is placed between the plates of the capacitor, as in Figure

What is the strength of the electric field between the plates of the capacitor?

Consider below a single metal insulated sphere, ainitially uncharged.

One such room has a capacitance of 6. To answer this question, complete the following steps.

The plates of a 0. What forces are acting on the oil drop, regardless of its acceleration?

Chapter 36 Reflection of Light.

A kg basketball player crouches down 0. A shopper pushes a grocery cart Suggest us how to improve StudyLib For complaints, use another form. What happens to the strength of an electric field when the magnitude of the test charge is halved? What is the net charge on the drop? Potential Difference What is the difference between electric potential energy and electric potential difference?

Hint: Find the wobbly bits exercises to lose weight traveled up the incline assuming a wejght path as shown in the figure. To demonstrate this, find the final speed and the time taken for a skier who skies Unreasonable Results A car advertisement claims that its kg car accelerated from rest to Note that the total mass of the counterbalanced system is 10, kg—so that only kg is raised in height, but the full 10, kg is accelerated. Construct a problem in which you calculate the long-term rate at which stairs can be climbed considering the mass of the person, his ability to generate power with his legs, and the height of a single stair step.

Explain how to determine the change in kinetic energy in each of the following cases. Classify the following by writing C beside each conductor, I beside each insulator, and S beside each semiconductor. If you ignore friction, how does the energy of the bob at the highest points of its path compare to the energy at the lowest point of its path?

Table of chaptdr Elements. What is the magnitude of the force the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is kg? What is the ideal mechanical advantage of the pulley system? The outer electrons in metals are not tightly bound to the atomic nuclei.

To answer this question, complete the following steps. What are the direction and the magnitude of the force exerted on an electron located at this distance? These are liters at sea level. She does work in both directions. How much work is done to transfer 0.

Hint: You must find the distance the plane travels in s assuming constant chater. How much work is done to move a proton 25 cm through that field? If the potential difference between them is V, what is the capacitance of the system? What does the magnitude of the net charge on one plate need to be to increase the electric potential difference to

The oil drop shown in Figure 24 is negatively charged and weighs 4. SOLUTION: Since the- Powered angle ofbyincidence of the light from the top of the mountain is equal to its angle of reflection eSolutions Manual Cognero Page 35 from the lake, you and the reflection of the top of the mountain form a triangle that is similar to a triangle formed by the mountain and the top of its reflection in the lake. How much charge is transferred? Critical Thinking Explain how the charge in Figure 18 continues to build up on the metal dome of a Van de Graaff generator. What are the direction and the magnitude of the electric field at 1. Find her final speed at the top, given that the coefficient of friction between her skis and the snow is 0. You would divide the force by the strength of the test charge, so the results would be the same.

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Two fire trucks with sirens on speed toward and away from an observer as shown below. What is the speed of the ocean waves? Label the right-hand sphere below with the appropriate charges below for a positively-charged rod touching a metal sphere. All pendulums swing at the same rate. This result has been unintentionally achieved by several real rockets. The positive and negative charges balance. Since astronauts in orbit are apparently weightless, a clever method of measuring their masses is needed to monitor their mass gains or losses to adjust diets.

Find his power output for work done against the gravitational force and air resistance.

A sine curve that represents a transverse wave is drawn below.

Also consider why the same person can descend stairs at a faster rate for a nearly unlimited time in spite of the fact that very similar forces are exerted going down as going up. A force of

A lightning rod placed above a building repels electrons in the air to prevent leaking of the charge onto the ground. Math Practice On a separate sheet of paper, solve the following problems.

The Stanford Linear Accelerator was 3. Circle the letter that describes the source of all waves.

A breeze blowing on the flea parallel to the ground exerts a force of 0. Chapter 3 Newtons Laws. Chapter 14 Fluids in Motion. It changes to heat in the machinery due to friction.

What is electric potential? The mass of the system is kg. The block of ice weighs newtons. These materials are good conductors insulators. Step-by-step, authors walk readers through coming up with solutions to exercises in their topic of choice. Eugene Hecht has authored nine books including Opticspublished by Addison Wesley, which has been the leading text in the field for several decades.

He exerts a force of N on the crate parallel to the ramp and moves at a constant speed. Suggest us how to improve StudyLib For complaints, use another form. You can add this document to your saved list Sign in Available only to authorized users. This is not as far-fetched as it may sound—there are thousands of nuclear bombs, and their energy can be trapped in underground explosions and converted to electricity, as natural geothermal energy is. A voltmeter indicates that the electric potential difference between two plates is

A converging lens has a focal length of Mountain Scene You can see an image of a distant mountain in a smooth lake just as you can see a mountain biker next to the lake because light from each strikes the surface of the lake at about the same angle of incidence and is reflected to your eyes. Suppose a star times brighter than our Sun that is, emitting times the power suddenly goes supernova. See Table 7. Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge A negative charge of 2. Charge Sharing If you touch a large, positively charged, conducting sphere with a small, negatively charged, conducting sphere, what can be said about the a.

Find the speed of the block at ground level in each case. Such deceleration caused one test subject to black e,ectric and have temporary blindness. The speed of a wave depends on the medium through which it travels. The gravitational force is much stronger than the electrical force. The vector indicates the magnitude and direction of the force that a positive test charge would experience at that point. Chapter 16 Ideal Gases.

## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Note that the answer is independent of the velocity of the gymnast—she can be moving either up or down, or be stationary. Sound travels faster in air than in water. One solution to this problem is to have head-on collisions between particles moving in opposite directions.

Hint: See Table 7. Suggest us how to improve StudyLib For complaints, use another form. Suppose you connect both a 3. Fieldds there were an equal number of positive and negative charges on the spheres before touching, then both spheres would be neutral after touching. Find his power output for work done against the gravitational force and air resistance. Write a brief essay on this person and include a discussion of the work that justified the honor of having a unit named for him.

What electric field intensity exists between them? Electric Field. Boxing gloves are padded to lessen the force of a blow. How much work does it take to move 0. What is the strength of the force exerted on the test charge? If it is placed

## Early Accelerators

But if the energy of the incoming particles is electdic enough, new matter is sometimes created in the collision. At these sizes, the electromagnetic force begins to affect nuclear stability. What is the speed of the ocean waves? Circle the letter of each statement about a pendulum that is true. Since astronauts in orbit are apparently weightless, a clever method of measuring their masses is needed to monitor their mass gains or losses to adjust diets.

Integrated Concepts An elevator filled with passengers has a mass of kg. Conceptual Questions The total energy in the beam of an accelerator is far greater than the energy of the individual beam particles. One major innovation was driven by the desire to create more massive particles. Discussion A voltage of this magnitude is not difficult to achieve in a vacuum. A material through which electric charge can flow is a n electric conductor.

When you apply a potential difference of V between two lowe plates, the field between them is 3 4. What electric potential difference exists across a 5. Assume all values are known to three significant figures. To demonstrate this, find the final speed and the time taken for a skier who skies If each mirror has a mass of 1.

The coefficient of friction between the sled and the snow is 0.

Chapter 8 Impulse and Momentum.

SOLUTION: The arrows going away from a positive charge point away from the charge; the arrows going away from a negative charge point toward the charge.

My highlights. She does work in both directions. Suppose that you place a 2. What is the vertical displacement of the drops when they leave the plates?

What is the magnitude of the electric field at a position that is 1. Boxing gloves are padded to lessen the force of a blow. These proportions neglect the mass of bulk and nondigestible materials consumed. Write a brief explanation that you could use to explain this concept to a friend who does not understand the relationship between the two concepts. Rank the following

Chapter Assessment: Applying Concepts Figure 27 shows three spheres with charges of equal magnitude, with their signs as shown. How much charge is on a 0.

SOLUTION: Since the- Powered angle ofbyincidence of the light from the top of the mountain is equal to its angle of reflection eSolutions Manual Cognero Page 35 from the lake, you and the reflection of the top of the mountain form a triangle that is similar to a triangle formed by the mountain and the top of its reflection in the lake. Explicitly show how you follow the steps in the Problem-Solving Strategies for Energy. To answer this question, complete the following steps. Note that the total mass of the counterbalanced system is 10, kg—so that only kg is raised in height, but the full 10, kg is accelerated.

These proportions neglect the mass of bulk and nondigestible materials consumed. Historians estimate that 20, workers spent 20 years to construct it, working hour days, days per year.

Assume that the mass of the system is kg, the thrust T is 2. The crests of bow waves overlap at their edges.

The graph in Figure 31 represents the amount of charge stored on one plate of a capacitor as a function of the charging potential.

One way to do this is to exert a known force on an astronaut and measure the acceleration produced. Note that this is not significantly greater than the extremely relativistic kinetic energy.

Chapter 16 Ideal Gases.

The negatively charged bottoms of clouds induce a positive charge on the surface of Earth below. Chapter 28 Equivalent Resistance Simple Circuits. Yes, the distance increased by a factor of 4, so the force should decrease by a factor of 4 squared, or The loaded cart has a mass of

Chapter Assessment: Writing in Physics How much work does a supermarket checkout attendant do on a can of soup he pushes 0. What is the capacitance of the capacitor? After exerting a force on the floor through this 0. What electric field intensity exists between them? Two unlike-charged oil drops are held motionless in a Millikan oil-drop experiment at the same time. Possible form of the correct answer.

Find the magnitude and 21 the Practice direction Problems, of the electric field strength at a point above the x-axis that would form the apex of an equilateral Chapter Review, and Assessment triangle with spheres A and B. SOLUTION: Since the angle of incidence of the light from the top of the mountain is equal to its angle of reflection from the lake, you and the reflection of the top of the mountain form a triangle that is similar to a triangle formed by the mountain and the top of its reflection in the lake. Answer Key. In such a unit, a capacitor of

Assume Michelson used a rotating octagon with a mirror on each face of the octagon. Integrated Concepts A A negative test charge is placed in an electric field as shown in Figure 3. Millikan Experiment When the net charge on an oil drop suspended in a Millikan apparatus is changed, the drop begins to fall. Kanellos Kanellopoulos flew km from Crete to Santorini, Greece, on April 23,in the Daedalus 88an aircraft powered by a bicycle-type drive mechanism see Figure 7.

Why would you expect the problem to be more severe for electron accelerators than proton accelerators? Both repelling and attracting forces act on you, and the forces cancel each other out. If the charge on one of the particles is doubled, the force is unchanged halved doubled quadrupled. Integrated Concepts A 2. It has a little more negative charge on one side than the other. This may be done either graphically or by using trigonometry. Circle the letter for the equation you can use to find the kinetic energy of an object.

Use data from Table 7. Description optional. Calculate the magnitude of the average force on a bumper that collapses 0.

What is the direction of the force on a negatively charged particle? These are liters at sea level. Answers will vary. Find the magnitude and the direction of the electric field strength at a point above the x-axis that would form the apex of an equilateral triangle with spheres A and B. An oil drop weighs 1. The electric field in a particle accelerator has a magnitude of 4. What electric field intensity exists between them?

The drop is suspended in an 3 electric field intensity of 5. See Figure 7. Charge Z now has a small positive charge on it. WhatPage is 18 the strength of the force exerted on the test charge? What is the difference between electric potential energy and electric potential difference? Add to collection s Add to saved.

Do not neglect the force to support his weight as well as that to accelerate him. What does the area under the graph line represent? A capacitor that is connected to a Use data from Table 7.

Integrated Concepts Repeat Exercise 4. A machine is a device used to or change the direction of forces. Draw the signs of charge in cwhen the spheres are separated while the rod is still present, and in d after the rod has been removed. What type of movement could be caused by this force? Synchrotron radiation produced by accelerators is sometimes used as a source of intense energetic electromagnetic radiation for research purposes.

A nurse pushes a cart by exerting a force on the handle at a downward angle Figure 4. Positrons created by the accelerator were fhapter to the same energy and collided with electrons in specially designed detectors. Describe the change in potential energy, kinetic energy, and total energy as the person falls. This produced the first convincing evidence of a quark structure inside nucleons in an experiment analogous to those performed by Rutherford long ago. Plan and Solve What unknown are you trying to calculate?

How many excess electrons does it carry? Chapter Assessment: Mixed Review Suppose fiflds g kookaburra a large kingfisher bird picks up a g snake and raises it 2. Study collections Here. The average force of friction including air resistance was N. The drop is suspended in an 3 electric field intensity of 5. What is the magnitude of the electric field at a position that is 1.

In such a unit, a capacitor of Chapter Assessment: Applying Concepts

Because the sound wave crests reach our ears one at a time and are perceived as a continuous tone.

Historians estimate that 20, workers spent 20 years to construct it, working hour days, days per year.

Modern Behemoths and Colliding Beams.

This could be the amount of heavy snow on 20 m of footpath. Boxing 333 are padded to lessen the force of a blow. How many excess electrons does it carry? Show that the final speed of the toy car is 0. What is the direction of the force on a negatively charged particle? See Figure 7. What is the electric field intensity at that point?

What is the magnitude of the elextric field at a distance twice as far from the point charge in the previous problem? Download advertisement. Spheres y and z are held in place, but sphere x is free to move. A hydroelectric power facility see Figure 7. For complaints, use another form. A negative charge of 2.