The Answer Key
A logic chip used in a computer dissipates 3 W of power in an environment at 120°F, and has a heat t
5:35
The Answer Key
A 15-cm-diameter aluminum ball is to be heated from80°C to an average temperature of 200°C. Taking t
7:09
The Answer Key
A fabric used in air-inflated structures is subjected to a biaxial loading that results in normal st
21:25
The Answer Key
A material point is observed to start yielding at the state of plane stress represented in the figur
12:39
The Answer Key
For the given state of stress, determine (a) the orientation of the planes of maximum in-plane shear
6:41
The Answer Key
When walking toward a concave mirror you notice that the image flips at a distance of 0.50 m. What i
2:52
The Answer Key
How far from a concave mirror (radius 24.0 cm) must an object be placed if its image is to be at inf
5:04
The Answer Key
A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun's rays 18.8 cm in front
5:29
The Answer Key
Two plane mirrors meet at a 135 angle, Fig. 32-45. If light rays strike one mirror at 38' as shown,
7:16
The Answer Key
The block of glass (n = 1.5) shown in cross section in Fig. 32-51 is surrounded by air. A ray of lig
12:44
The Answer Key
The speed of light in ice is 2.29 X 10^8 m/s, What is the index of refraction of ice?
1:48
The Answer Key
A light beam coming from an underwater spotlight exits the water at an angle of 56.0'. At what angle
5:33
The Answer Key
A light beam strikes a 2.0-cm-thick piece of plastic with a refractive index of 1.62 at a 45 angle.
12:56
The Answer Key
Rays of the Sun are seen to make a 33.0 angle to the vertical beneath the water. At what angle above
6:52
The Answer Key
A flashlight beam strikes the surface of a pane of glass(n = 1.56) at a 63' angle to the normal. Wha
5:00
The Answer Key
A diver shines a flashlight upward from beneath the water at a 38.5° angle to the vertical. At what
5:04
The Answer Key
A helium-filled balloon escapes a child's hand at sea level and 20.0 C. When it reaches an altitude
3:48
The Answer Key
It is observed that 55.50 mL of water at 20' C completely fills a container to the brim. When the co
10:03
The Answer Key
What is the pressure inside a 38.0-L container holding 105.0 kg of argon gas at 20.0'C?
6:29
The Answer Key
A police car sounding a siren with a frequency of1280 Hz is traveling at 120.0 km/h. (a) What freque
18:52
The Answer Key
Two automobiles are equipped with the same single frequency horn. When one is at rest and the other
6:58
The Answer Key
A bat at rest sends out ultrasonic sound waves at50.0 kHz and receives them returned from an object
7:08
The Answer Key
The predominant frequency of a certain fire truck's siren is 1350 Hz when at rest. What frequency do
4:51
The Answer Key
A jet plane emits 5.0 X 105 J of sound energy per second. (a) What is the sound level 25 m away? Ai.
10:15
The Answer Key
At a rock concert. a dB meter registered 130 dB when placed 2.2 m in front of a loudspeaker on the s
8:03
The Answer Key
A person standing a certain distance from an airplane with four equally noisy jet engines is experie
7:06
The Answer Key
If two firecrackers produce a sound level of 95 dB when fired simultaneously at a certain place, wha
8:28
The Answer Key
A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff
2:34
The Answer Key
A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other e
5:52
The Answer Key
A 0.35-kg mass at the end of a spring oscillates 2.5 times per second with an amplitude of 0.15 m. D
8:48
The Answer Key
(a) At what displacement of a SHO is the energy half kinetic and half potential? (b) What fraction o
6:04
The Answer Key
A 1.15-kg mass oscillates according to the equation x = 0.650 cos 7.401 where x is in meters and I i
10:42
The Answer Key
A bungee jumper with mass 65.0 kg jumps from a high bridge. After reaching his lowest point, he osci
9:44
The Answer Key
An object of unknown mass m is hung from a vertical spring of unknown spring constant k, and the obj
5:09
The Answer Key
A 1.25-kg mass stretches a vertical spring 0.215 m. If the spring is stretched an additional 0.130 m
5:56
The Answer Key
Figure 14-29 shows two examples of SHM, labeled A and B. For each, what is (a) the amplitude, (b) th
6:24
The Answer Key
A shop sign weighing 215 N is supported by a uniform 155-N beam as shown in Fig. 12-59. Find the ten
16:48
The Answer Key
A marble column of cross-sectional area 1.4 m^2 supports a mass of 25,000 kg. (a) What is the stress
5:09
The Answer Key
A nylon string on a tennis racket is under a tension of 275 N. If its diameter is 1.00 mm, by how mu
4:59
The Answer Key
(a) Calculate the magnitude of the force, FM, required of the "deltoid" muscle to hold up the outstr
15:56
The Answer Key
Calculate FA and FB for the beam shown in Fig. 12-55.The downward forces represent the weights of ma
12:48
The Answer Key
A traffic light hangs from a pole as shown in Fig. 12-60.The uniform aluminum pole AB is 7.20 m long
16:55
The Answer Key
A 110-kg horizontal beam is supported at each end. A320-kg piano rests a quarter of the way from one
11:43
The Answer Key
Two cords support a chandelier in the manner shown in Fig 12-3 except that the upper cord makes an a
8:01
The Answer Key
Three forces are applied to a tree sapling, as shown in Fig. 12-45, to stabilize it. If FA = 385 N a
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The Answer Key
A uniform steel beam has a mass of 940 kg. On it is resting half of an identical beam, as shown in F
10:16
The Answer Key
A 75-kg adult sits at one end of a 9.0-m-Iong board. His 25-kg child sits on the other end. (a) Wher
16:29
The Answer Key
The intensity of an earthquake wave passing through the Earth is measured to be 3.0 X 106 J/m2·s at
6:20
The Answer Key
A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wa
4:38
The Answer Key
A pilot performs an evasive maneuver by diving vertically at 310 m/s. If he can withstand an acceler
4:03
The Answer Key
Calculate FA and FB for the uniform cantilever shown in Fig. 12-7 whose mass is 1200 kg.
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The Answer Key
How close to the edge of the 24.0-kg table shown in Fig. 12-53 can a 66.0-kg person sit without tipp
9:58
The Answer Key
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle 0 (Fig. 1
3:18
The Answer Key
Two blocks, each of mass m, are attached to the ends of a massless rod which pivots as shown in Fig.
5:26
The Answer Key
Two masses, mA = 35.0 kg and mB = 38.0 kg, are connected by a rope that hangs over a pulley (as in F
14:59
The Answer Key
To get a flat, uniform cylindrical satellite spinning at the correct rate, engineers fire four tange
10:37
The Answer Key
A fisherman notices that wave crests pass the bow of his anchored boat every 3.0 s. He measures the
2:38
The Answer Key
(a) A brass plug is to be placed in a ring made of iron. At 15 C, the diameter of the plug is 8.753
13:14
The Answer Key
If 14.00 mol of helium gas is at 10.0'C and a gauge pressure of 0.350 atm, calculate (a) the volume
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The Answer Key
A 3.25-kg piece of wood (SG = 0.50) floats on water. What minimum mass of lead, hung from the wood b
8:40
The Answer Key
A scuba diver and her gear displace a volume of 65.0 L and have a total mass of 68.0 kg. (a) What is
6:55
The Answer Key
If 5.0 L of antifreeze solution (specific gravity = 0.80) is added to 4.0 L of water to make a 9.0-
9:14
The Answer Key
How fast does water flow from a hole at the bottom of a very wide, 5.3-m-deep storage tank filled wi
2:03
The Answer Key
(a) Determine the total force and the absolute pressure on the bottom of a swimming pool 28.0 m by 8
8:32
The Answer Key
A fish tank has dimensions 36 cm wide by 1.0 m long by .60 m high. If the filter should process all
8:31
The Answer Key
A 180-km/h wind blowing over the flat roof of a house causes the roof to lift off the house. If the
10:46
The Answer Key
What is the lift (in newtons) due to Bernoulli's principle on a wing of area 88 m2 if the air passes
9:21
The Answer Key
A house at the bottom of a hill is fed by a full tank of water 5.0 m deep and connected to the house
6:35
The Answer Key
To what temperature will 8700 J of heat raise 3.0 kg of water that is initially at 10.0°C?
4:09
The Answer Key
A 6.0-cm-diameter horizontal pipe gradually narrows to 4.5 cm. When water flows through this pipe at
12:07
The Answer Key
A geologist finds that a Moon rock whose mass is 9.28 kg has an apparent mass of 6.18 kg when submer
6:00
The Answer Key
A spherical balloon has a radius of 7.35 m and is filled with helium. How large a cargo can it liftf
10:55
The Answer Key
Water and then oil (which don't mix) are poured into a U-shaped tube, open at both ends. They come t
7:05
The Answer Key
Given that the acceleration of gravity at the surface of Mars is 0.38 of what it is on Earth, and t.
8:39
The Answer Key
At what distance from the Earth will a spacecraft traveling directly from the Earth to the Moon expe
8:07
The Answer Key
An exceptional standing jump would raise a person 0.80 m off the ground. To do this, what force must
9:31
The Answer Key
The design of a new road includes a straight stretch that is horizontal and flat but that suddenly d
10:02
The Answer Key
Highway curves are marked with a suggested speed. If this speed is based on what would be safe in we
9:23
The Answer Key
Two blocks made of different materials connected together by a thin cord, slide down a plane ramp in
19:19
The Answer Key
A child slides down a slide with a 34° incline, and at the bottom her speed is precisely half what i
15:30
The Answer Key
If a curve with a radius of 85 m is properly banked for a car traveling 65 km/h, what must be the co
15:39
The Answer Key
A 975-kg sports car (including driver) crosses the rounded top of a hill (radius = 88.0 m) at 12.0 m
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The Answer Key
A coin is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of
9:37
The Answer Key
A train locomotive is pulling two cars of the same mass behind it, Fig. 4-39. Determine the ratio of
5:30
The Answer Key
A 75-kg petty thief wants to escape from a third-story jail window. Unfortunately, a makeshift rope
6:26
The Answer Key
An object is hanging by a string from your rearview mirror. While you are accelerating at a constant
8:11
The Answer Key
The two masses shown in Fig. 4-50 are each initially 1.8 m above the ground, and the massless fricti
15:28
The Answer Key
A 27-kg chandelier hangs from a ceiling on a vertical 4.0-m-long wire. (a) What horizontal force wo
9:37
The Answer Key
Suppose the pulley in Fig. 4-46 is suspended by a cord C. Determine the tension in this cord after t
9:32
The Answer Key
A swimmer is capable of swimming 0.60 m/s in still water. (a) If she aims her body directly across a
5:32
The Answer Key
Determine the vector A - C, given the vectors A and C in Fig. 3-38.
10:23
The Answer Key
The summit of a mountain, 2450 m above base camp, is measured on a map to be 4580 m horizontally fr
11:48
The Answer Key
An airplane is heading due south at a speed of 580 km/h. If a wind begins blowing from the southwest
14:41
The Answer Key
You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation
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The Answer Key
A centrifuge rotor has a moment of inertia of4.25 X 10-' kg· m2 How much energy is required to bring
4:24
The Answer Key
A 920-kg sports car collides into the rear end of a 2300-kg SUV stopped at a red light. The bumpers
13:09
The Answer Key
A 1280-kg car pulls a 350-kg trailer. The car exerts a horizontal force of 3.6 X 103 N against the g
13:19
The Answer Key
An electron with speed Vo = 27.5 X 106 m/s is traveling parallel to a uniform electric field of magn
11:08
The Answer Key
In a certain region of space, the electric field is constant in direction (say horizontal, in the x
11:00
The Answer Key
A storage tank at STP contains 28.5 kg of nitrogen (N2).(a) What is the volume of the tank? (b) What
10:32