Commons

More documents

Recommendations

Info

the two momenta have reversed their directions, but they still cancel. Neither object has changedits kinetic energy, so the total energy before and after the collision is also the same.Answers to Self-Checks for Chapter 5Page 99, self-check A: Either type can be involved in either an attraction or a repulsion. Apositive charge could be involved in either an attraction (with a negative charge) or a repulsion(with another positive), and a negative could participate in either an attraction (with a positive)or a repulsion (with a negative).Page 99, self-check B: It wouldn’t make any difference. The roles of the positive and negativecharges in the paper would be reversed, but there would still be a net attraction.Answers to Self-Checks for Chapter 6Page 126, self-check A: An induced electric field can only be created by a changing magneticfield. Nothing is changing if your car is just sitting there. A point on the coil won’t experiencea changing magnetic field unless the coil is already spinning, i.e., the engine has already turnedover.Answers to Self-Checks for Chapter 7Page 140, self-check A: Only 1 is correct. If you draw the normal that bisects the solid ray,it also bisects the dashed ray.Page 143, self-check B: He’s five times farther away than she is, so the light he sees is 1/25the brightness.Page 150, self-check C: You should have found from your ray diagram that an image is stillformed, and it has simply moved down the same distance as the real face. However, this newimage would only be visible from high up, and the person can no longer see his own image.Page 152, self-check D: Increasing the distance from the face to the mirror has decreased thedistance from the image to the mirror. This is the opposite of what happened with the virtualimage.Answers to Self-Checks for Chapter 8Page 168, self-check A: The leading edge is moving up, the trailing edge is moving down,and the top of the hump is motionless for one instant.Solutions to Selected Homework ProblemsSolutions for chapter 1Page 35, problem 1:134 mg × 10−3 g1 mg × 10−3 kg= 1.34 × 10 −4 kg1 gSolutions for chapter 3Page 71, problem 4: The pliers are not moving, so their angular momentum remains constantat zero, and the total torque on them must be zero. Not only that, but each half of the pliersmust have zero total torque on it. This tells us that the magnitude of the torque at one endmust be the same as that at the other end. The distance from the axis to the nut is about 2.5182
cm, and the distance from the axis to the centers of the palm and fingers are about 8 cm. Theangles are close enough to 90 ◦ that we can pretend they’re 90 degrees, considering the roughnature of the other assumptions and measurements. The result is (300 N)(2.5 cm) = (F )(8 cm),or F = 90 N.183
Page 2 and 3:
copyright 2006 Benjamin Crowellrev.
Page 4 and 5:
ContentsMomentum compared to kineti
Page 7 and 8:
Chapter 1Conservation of Mass andEn
Page 9 and 10:
1.2 Conservation of MassWe intuitiv
Page 11 and 12:
masses on the spring, and they both
Page 13 and 14:
A common source of confusion is the
Page 15 and 16:
Discussion questionA Each of the fo
Page 17 and 18:
l / Galileo Galilei was the first p
Page 19 and 20:
that this wasn’t really an argume
Page 21 and 22:
the girl on the left goes up a cert
Page 23 and 24:
1. kinetic energy2. gravitational e
Page 25 and 26:
In fact, your body uses up even mor
Page 27 and 28:
kinetic energy is twice as much. Bu
Page 29 and 30:
ather than flying off straight. New
Page 31 and 32:
of mass?Actually they’re not even
Page 33 and 34:
ecause the square of the speed of l
Page 35 and 36:
ProblemsKey√∫⋆A computerized
Page 37 and 38:
13 How high above the surface of th
Page 39 and 40:
Chapter 2Conservation ofMomentumFan
Page 41 and 42:
win the Martian version of the Nobe
Page 43 and 44:
a / How can we prove that this coll
Page 45 and 46:
all.This is exactly like the rules
Page 47 and 48:
Unequal masses example 4⊲ Suppose
Page 49 and 50:
ForceDefinition of forceWhen moment
Page 51 and 52:
ent relationship:(fingers on scale)
Page 53 and 54:
pressed in modern units). If the ea
Page 55 and 56:
p / A bowling ball is in the back o
Page 57 and 58:
Kepler’s law of periodsLet T , ca
Page 59 and 60:
2.5 WorkImagine a black box 8 , con
Page 61 and 62:
Page 63 and 64:
A tornado touches down in Spring Hi
Page 65 and 66:
pensated for by an overall increase
Page 67 and 68:
Kepler’s equal-area law example 4
Page 69 and 70:
Torque distinguished from forceOf c
Page 71 and 72:
Page 73 and 74:
Chapter 4RelativityComplaining abou
Page 75 and 76:
motion of the apparatus. For instan
Page 77 and 78:
fore Einstein. In fact, George Fitz
Page 79 and 80:
We are used to thinking of time as
Page 81 and 82:
j / In the garage’s frame of refe
Page 83 and 84:
is now sufficiently advanced to all
Page 85 and 86:
astronauts had twin siblings back o
Page 87 and 88:
The derivation of the correct relat
Page 89 and 90:
efore the collision0 1.60.9 0.7afte
Page 91 and 92:
e the same as they always were. The
Page 93 and 94:
(b) Show that your result is approx
Page 95 and 96:
Chapter 5ElectricityWhere the teles
Page 97 and 98:
to the egg.Luckily, we now know eno
Page 99 and 100:
“A” as negative, but it really
Page 101 and 102:
The main subtlety involved in this
Page 103 and 104:
Note that an example like g/3 does
Page 105 and 106:
⊲ An ampere-hour is a unit of cur
Page 107 and 108:
portional to the voltage difference
Page 109 and 110:
ing your feet on a carpet, and then
Page 111 and 112:
Page 113 and 114:
This sunspot is a product of the su
Page 115 and 116:
directions strongly evokes wave met
Page 117 and 118:
The electric fieldThe definition of
Page 119 and 120:
trical interaction. This seems like
Page 121 and 122:
except that the bottom charge is no
Page 123 and 124:
q / The force on a charged particle
Page 125 and 126:
time it took for the black coil’s
Page 127 and 128:
charge, there will be magnetic fiel
Page 129 and 130:
z / Panel 1 shows the electromagnet
Page 131 and 132: used to make images of individual a
Page 133 and 134: Chapter 7The Ray Model of Light7.1
Page 135 and 136: Today, photography provides the sim
Page 137 and 138: Interaction of light with matterAbs
Page 139 and 140: g / Examples of ray diagrams.h / Th
Page 141 and 142: in their passing out of one medium
Page 143 and 144: Figure k shows what happens if you
Page 145 and 146: m / At double the distance, the par
Page 147 and 148: infrared, you don’t emit visible
Page 149 and 150: infinitesimally from it. In figure
Page 151 and 152: physical shape of the mirror’s su
Page 153 and 154: Sketch another copy of the face in
Page 155 and 156: Discussion questionsA The figure sh
Page 157 and 158: DLocate the images formed by the pe
Page 159 and 160: Problem 2.4 In this chapter we’ve
Page 161 and 162: signals to travel between you and t
Page 163 and 164: “The Great Wave Off Kanagawa,”
Page 165 and 166: amplitude, A. The definition of amp
Page 167 and 168: a single hump or trough. If you hit
Page 169 and 170: Surfing example 3The incorrect beli
Page 171 and 172: Sound wavesThe phenomenon of sound
Page 173 and 174: do they signify in the case of a wa
Page 175 and 176: ⊲ Solving for wavelength, we have
Page 177 and 178: ProblemsKey√∫⋆A computerized
Page 179 and 180: Appendix 1: Photo CreditsExcept as
Page 181: Appendix 2: Hints and SolutionsAnsw
Page 185 and 186: Foucault, Léon, 17frame of referen
Page 187: twin paradox, 83units, conversion o
show all

Commons

Create successful ePaper yourself

Delete template?

Save as template?