Physics: Principles With Applications, 7th Edition Test Bank

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ExamName___________________________________MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)Approximately how many pennies would you have to stack to reach an average 8-foot ceiling?1)A)2×103B)2×102C)2 x106D)2×104E)2×105Answer:ADiff: 0Type: MC2)What is0.6740.74to the proper number of significant figures?2)A)0.91B)0.9108C)0.911D)0.9Answer:ADiff: 0Type: MC3)If, in a parallel universe,Δhas the value 3.14149, expressΔin that universe to four significantfigures.3)A)3.141B)3.142C)3.1415D)3.1414Answer:ADiff: 0Type: MC4)Express (4.3×106)-1/2in scientific notation.4)A)2.1×104B)2.1×103C)4.8×10-4D)2.1×10-5Answer:CDiff: 0Type: MC5)If an operatic aria lasts for 5.75 min, its length expressed in seconds isxs, wherexis5)A)less than 5.75.B)greater than 5.75.Answer:BDiff: 0Type: MC6)The wavelength of a certain laser is0.35micrometers,where1 micrometer=1×10-6m.Expressthis wavelength in nanometers.6)A)3.5×104nmB)3.5×101nmC)3.5×102nmD)3.5×103nmAnswer:CDiff: 0Type: MC7)Estimate the number of pennies that would fit in a box one foot long by one foot wide by one foottall.7)A)5 x106B)5×105C)5×103D)5×102E)5×104Answer:EDiff: 0Type: MC1

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8)The period of a pendulum is the time it takes the pendulum to swing back and forth once. If theonly dimensional quantities that the period depends on are the acceleration of gravity,g, and thelength of the pendulum,G, what combination ofgandGmust the period be proportional to?(Acceleration has SI units of m·s-2.).8)A)g/GB)gG2C)gGD)G/gE)gGAnswer:DDiff: 0Type: MC9)The shortest wavelength of visible light is approximately 400 nm. Express this wavelength incentimeters.9)A)4×10-11cmB)400×10-11cmC)4×10-7cmD)4×10-5cmE)4×10-9cmAnswer:DDiff: 0Type: MC10)What is the difference between103.5 and 102.24written with the correct number of significantfigures?10)A)1B)1.3C)1.26D)1.260E)1.2600Answer:BDiff: 0Type: MC11)Estimate the number of times the earth will rotate on its axis during a human's lifetime.11)A)3×104B)3×105C)3×106D)3 x108E)3×107Answer:ADiff: 0Type: MC12)The exhaust fan on a typical kitchen stove pulls 600 CFM (cubic feet per minute) through the filter.Given that 1.00 in.=2.54 cm, how many cubic meters per second does this fan pull?12)A)32.8 m3/secB)3.05 m3/secC)0.283 m3/secD)0.328 m3/secAnswer:CDiff: 0Type: MC13)What is 34+(3)×(1.2465) written with the correct number of significant figures?13)A)37.74B)37.7C)38D)4×101E)37.7395Answer:CDiff: 0Type: MC14)Convert1.2×10-3to decimal notation.14)A)1.200B)0.1200C)0.0120D)0.0012E)0.00012Answer:DDiff: 0Type: MC2

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15)Convert a speed of 4.50 km/h to units of ft/min. (1.00 m=3.28 ft)15)A)246 ft/minB)82.3 ft/minC)0.246 ft/minD)165 ft/minE)886 ft/minAnswer:ADiff: 0Type: MC16)Write out the number7.35×10-5in full with a decimal point and correct number of zeros.16)A)0.00000735B)0.0000735C)0.000735D)0.00735E)0.0735Answer:BDiff: 0Type: MC17)A certain CD-ROM disk can store approximately 6.0×102megabytes of information, where 106bytes=1 megabyte. If an average word requires9.0bytes of storage, how many words can bestored on one disk?17)A)2.0×109wordsB)6.7×107wordsC)2.1×107wordsD)5.4×109wordsAnswer:BDiff: 0Type: MC18)When determining the number of significant figures in a number, zeroes to the left of the decimalpoint are never counted.18)A)TrueB)FalseAnswer:BDiff: 0Type: MC19)A marathon is26 miand385 ydlong. Estimate how many strides would be required to run amarathon. Assume a reasonable value for the average number offeet/stride.19)A)4.5×105stridesB)4.5×103stridesC)4.5×106stridesD)4.5×104stridesAnswer:DDiff: 0Type: MC20)The positionx, in meters, of an object is given by the equationx=A+Bt+Ct2, wheretrepresentstime in seconds. What are the SI units ofA,B, andC?20)A)m, s, s2B)m/s, m/s2, m/s3C)m, s, sD)m, m/s, m/s2E)m, m, mAnswer:EDiff: 0Type: MC3

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21)What is the sum of1.53+2.786+3.3written with the correct number of significant figures?21)A)8B)7.6C)7.62D)7.616E)7.6160Answer:BDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.22)Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields)the albert (A), the distance Albert can throw a small rock. One albert is92meters.Howmany square alberts is equal to one acre? (1 acre=43,560 ft2=4050 m2)22)Answer:1.29 A2Diff: 0Type: SAMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.23)If a woman weighs 125 lb, her mass expressed in kilograms isxkg, wherexis23)A)greater than 125.B)less than 125.Answer:BDiff: 0Type: MC24)In addition to 1 m=39.37 in., the following exact conversion equivalents are given:1 mile=5280 ft ,1 ft=12 in ,1 hour=60 min,and 1 min=60 s. If a particle has a velocity of8.4miles per hour,its velocity, in m/s, is closest to24)A)3.0m/s.B)4.5m/s.C)4.1m/s.D)3.4m/s.E)3.8m/s.Answer:EDiff: 0Type: MC25)If a flower is 6.5 cm wide, its width expressed in millimeters isxmm, wherexis25)A)greater than 6.5.B)less than 6.5.Answer:ADiff: 0Type: MC26)If a tree is 15 m tall, its height expressed in feet isxft, wherexis26)A)greater than 15.B)less than 15.Answer:ADiff: 0Type: MC27)Add3685gand66.8kgand express your answer in milligrams (mg).27)A)7.05×106mgB)7.05×107mgC)7.05×105mgD)7.05×104mgAnswer:BDiff: 0Type: MC28)The number 0.003010 has28)A)7 significant figures.B)6 significant figures.C)4 significant figures.D)2 significant figures.Answer:CDiff: 0Type: MC4

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29)What is the result of1.58÷3.793written with the correct number of significant figures?29)A)4.2×10-1B)4.1656×10-1C)4×10-1D)4.17×10-1E)4.166×10-1Answer:DDiff: 0Type: MC30)The current definition of the standard meter of length is based on30)A)the length of a particular object kept in France.B)the distance traveled by light in a vacuum.C)the distance between the earth and the sun.D)the distance between the earth's equator and north pole.Answer:BDiff: 0Type: MC31)What is 56+(32.00)/(1.2465+3.45) written with the correct number of significant figures?31)A)62.8B)62.812C)62.8123846D)62.81E)63Answer:EDiff: 0Type: MC32)The height of the ceiling in a typical home, apartment, or dorm room is closest to32)A)100 cm.B)200 cm.C)400 cm.D)500 cm.Answer:BDiff: 0Type: MC33)0.0001776can also be expressed as33)A)1.776×10-3.B)1.776×10-4.C)17.72×104.D)1772×105.E)177.2×107.Answer:BDiff: 0Type: MC34)The speed of a wave pulse on a string depends on the tension,F, in the string and the mass per unitlength,μ, of the string. Tension has SI units ofkg·m·s-2and the mass per unit length has SI unitsofkg·m-1.What combination ofFandμmust the speed of the wave be proportional to?34)A)μ/FB)F /μC)F/μD)μFE)μ/ FAnswer:BDiff: 0Type: MC5

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35)Scientists use the metric system chiefly because it is more accurate than the English system.35)A)TrueB)FalseAnswer:BDiff: 0Type: MC36)The following exact conversion equivalents are given: 1 m=100 cm , 1 in=2.54 cm, and1 ft=12 in.If a computer screen has an area of 1.27ft2, this area is closest to36)A)0.00284m2.B)4.65m2.C)0.118m2.D)0.284m2.E)0.0465m2.Answer:CDiff: 0Type: MC37)What is the value ofΔ(8.104)2, written with the correct number of significant figures?37)A)206.324B)206.323C)206.3D)206E)200Answer:CDiff: 0Type: MC38)A plot of land contains5.8acres.How many square meters does it contain?[1 acre=43,560 ft2]38)A)2.3×104m2B)5.0×104m2C)7.1×103m2D)7.0×104m2Answer:ADiff: 0Type: MC39)Approximately how many times does an average human heart beat in a year?39)A)4×107B)4×109C)4×108D)4×106E)4×105Answer:ADiff: 0Type: MC40)A person on a diet loses1.6kgin a week. How manymicrograms/second (μg/s)are lost?40)A)44μg/sB)1.6×105μg/sC)2.6×103μg/sD)6.4×104μg/sAnswer:CDiff: 0Type: MC41)0.00325×10-8cm can also be expressed in mm as41)A)3.25×10-12mm.B)3.25×10-11mm.C)3.25×10-10mm.D)3.25×10-9mm.E)3.25×10-8mm.Answer:CDiff: 0Type: MC6

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42)The current definition of the standard kilogram of mass is based on42)A)the mass a particular object kept in France.B)the mass of the sun.C)the mass of a cesium-133 atom.D)the mass of the earth.Answer:ADiff: 0Type: MC43)When adding two numbers, the number of significant figures in the sum is equal to the number ofsignificant figures in the least accurate of the numbers being added.43)A)TrueB)FalseAnswer:BDiff: 0Type: MC44)The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, yourcalculator gives the product as 0.68175. Rounding properly to the correct number of significantfigures, the area should be written as44)A)0.7 m2.B)0.68 m2.C)0.682 m2.D)0.6818 m2.E)0.68175 m2.Answer:CDiff: 0Type: MC45)What is the product of11.24 and 1.95written with the correct number of significant figures?45)A)22B)21.9C)21.92D)21.918E)21.9180Answer:BDiff: 0Type: MC46)How many nanoseconds does it take for a computer to perform one calculation if it performs6.7×107calculations per second?46)A)11 nsB)67nsC)15nsD)65 nsAnswer:CDiff: 0Type: MC47)Approximately how many times does an average human heart beat in a lifetime?47)A)3×109B)3×108C)3×1010D)3×107E)3×1011Answer:ADiff: 0Type: MC48)A weight lifter can bench press171kg.How many milligrams (mg) is this?48)A)1.71×108mgB)1.71×109mgC)1.71×107mgD)1.71×106mgAnswer:ADiff: 0Type: MC7

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49)The mass of a typical adult woman is closest to49)A)75 kg.B)20 kg.C)35 kg.D)150 kg.Answer:ADiff: 0Type: MC50)The current definition of the standard second of time is based on50)A)the oscillation of a particular pendulum kept in France.B)the earth's rotation rate.C)the duration of one year.D)the frequency of radiation emitted by cesium atoms.Answer:DDiff: 0Type: MC51)What is0.2052/3, expressed to the proper number of significant figures?51)A)0.348B)0.3477C)0.3D)0.35Answer:ADiff: 0Type: MC52)What is the sum of1123and 10.3 written with the correct number of significant figures?52)A)1133B)1133.3C)1133.3000D)1.13×103E)1.1×103Answer:ADiff: 0Type: MC8

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ExamName___________________________________MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)An airplane increases its speed at the average rate of 15 m/s2. How much time does it take toincrease its speed from 100 m/s to 160 m/s?1)A)0.25 sB)17 sC)0.058 sD)4.0 sAnswer:DDiff: 0Type: MC2)Consider a deer that runs from point A to point B. The distance the deer runs can be greater thanthe magnitude of its displacement, but the magnitude of the displacement can never be greater thanthe distance it runs.2)A)TrueB)FalseAnswer:ADiff: 0Type: MC3)An object is moving with constant non-zero acceleration in the+xdirection. The position versustime graph of this object is3)A)a horizontal straight line.B)a vertical straight line.C)a straight line making an angle with the time axis.D)a parabolic curve.Answer:DDiff: 0Type: MC4)A rock is projected upward from the surface of the Moon, at timet=0 s, with an upward velocityof 30.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s2, and the Moonhas no atmosphere. The height of the rock when it is descending with a speed of 20.0 m/s is closestto4)A)145 m.B)115 m.C)135 m.D)125 m.E)154 m.Answer:EDiff: 0Type: MC5)A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed isdoubled. If the actual contact with the bat lasts 0.45 s, what is the ratio of the magnitude of theaverage acceleration of the ball to its original speed?5)A)2.2 s-1B)0.15 s-1C)6.7 s-1D)4.4 s-1Answer:CDiff: 0Type: MC6)A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant airresistance. If it takes the 20-kg rock a timeTto reach the ground, what time will it take the 10-kgrock to reach the ground?6)A)4TB)T/2C)T/4D)2TE)TAnswer:EDiff: 0Type: MC1

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7)A car starting from rest accelerates at a constant 2.0 m/s2for 10 s. It then travels with constantspeed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration ofmagnitude 2.0 m/s2. How far does it travel after starting?7)A)300 mB)500 mC)400 mD)200 mAnswer:CDiff: 0Type: MC8)Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s. What was thespeed of the ball at launch? Neglect air resistance.8)A)23 m/sB)34 m/sC)11 m/sD)48 m/sE)45 m/sAnswer:ADiff: 0Type: MC9)A car increases its forward velocity uniformly from 40 m/s to 80 m/s while traveling a distance of200 m. What is its acceleration during this time?9)A)9.6 m/s2B)24 m/s2C)12 m/s2D)8.0 m/s2Answer:CDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.10)A foul ball is hit straight up into the air with a speed of 30 m/s, and air resistance isnegligible.(a) Calculate the time required for the ball to rise to its maximum height.(b) Calculate the maximum height reached by the ball above the point where it hit the bat.(c) Determine the times at which the ball passes a point 25 m above the point where it washit by the bat.(d) Explain why there are two answers to part (c).10)Answer:(a) 3.1 s(b) 46 m(c) 1.0 s and 5.1 s(d) One value for the ball traveling upward; one value for the ball travelingdownward.Diff: 0Type: SAMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.11)If the acceleration of an object is zero, then that object cannot be moving.11)A)TrueB)FalseAnswer:BDiff: 0Type: MC12)A bullet shot straight up returns to its starting point in 10 s. What is the initial speed of the bullet,assuming negligible air resistance?12)A)49 m/sB)9.8 m/sC)98 m/sD)25 m/sAnswer:ADiff: 0Type: MC2

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13)A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of themotorist for this trip?13)A)84 km/hB)91 km/hC)90 km/hD)89 km/hAnswer:DDiff: 0Type: MC14)What must be your average speed in order to travel 350 km in 5.15 h?14)A)68.0 km/hB)67.0 km/hC)69.0 km/hD)66.0 km/hAnswer:ADiff: 0Type: MC15)Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is itsacceleration just before it reaches its highest point?15)A)slightly greater thangB)slightly less thangC)zeroD)exactlygAnswer:DDiff: 0Type: MC16)An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What isthe average speed for the trip?16)A)275 mi/hB)270 mi/hC)260 mi/hD)280 mi/hAnswer:BDiff: 0Type: MC17)A toy rocket is launched vertically from ground level at timet=0.00 s. The rocket engine providesconstant upward acceleration during the burn phase. At the instant of engine burnout, the rockethas risen to81m and acquired an upward velocity of40m/s.The rocket continues to risewithinsignificant air resistancein unpowered flight, reaches maximum height, and falls back to theground. The upward acceleration of the rocket during the burn phase is closest to17)A)9.9m/s2.B)9.6m/s2.C)9.0m/s2.D)9.3m/s2.E)8.7m/s2.Answer:ADiff: 0Type: MC18)A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then 1.0 kmnorth to return to its starting point. This trip takes 45 min. What was the bear's average velocity?18)A)4.0 km/hB)0.067 km/hC)0.00 km/hD)5.3 km/hAnswer:CDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.19)If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr,starting from rest?19)Answer:5.6 sDiff: 0Type: SA3

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.20)A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What was the averagespeed of the runner in m/s?20)A)14.2 m/sB)3.95 m/sC)14,200 m/sD)124 m/sAnswer:BDiff: 0Type: MC21)To determine the height of a flagpole, Abby throws a ball straight up and times it. She sees that theball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a totalelapsed time of 4.1 s. How high is the pole above the point where the ball was launched? Neglectair resistance.21)A)16 mB)18 mC)13 mD)26 mE)10 mAnswer:EDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.22)The graph in the figure represents the velocity of a particle as it travels along thex-axis.What is the average acceleration of the particle betweent=2.0 s andt=4.0 s?22)Answer:1.5 m/s2Diff: 0Type: SAMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.23)A racquetball strikes a wall with a speed of 30 m/s and rebounds in the opposite direction with aspeed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball during thecollision with the wall?23)A)0 m/s2B)1500 m/s2C)200 m/s2D)2800 m/s2E)1300 m/s2Answer:DDiff: 0Type: MC24)A runner runs around a track consisting of two parallel lines 96 m long connected at the ends bytwo semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her averagespeed?24)A)10 m/sB)1.3 m/sC)0 m/sD)5.0 m/sE)2.5 m/sAnswer:DDiff: 0Type: MC4

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25)If the velocity of an object is zero, then that object cannot be accelerating.25)A)TrueB)FalseAnswer:BDiff: 0Type: MC26)A car is moving with a constant acceleration. At timet=5.0 s its velocity is 8.0 m/s in the forwarddirection, and at timet=8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in thatinterval of time?26)A)20 mB)30 mC)50 mD)40 mE)10 mAnswer:BDiff: 0Type: MC27)A jet plane is launched from a catapult on an aircraft carrier. In 2.0 s it reaches a speed of 42 m/s atthe end of the catapult. Assuming the acceleration is constant, how far did it travel during those 2.0s?27)A)84 mB)16 mC)24 mD)42 mAnswer:DDiff: 0Type: MC28)If the velocity versus time graph of an object is a straight line making an angle of+30° (counterclockwise) with the time axis, the object is28)A)moving with constant non-zero speed.B)moving with constant non-zero acceleration.C)at rest.D)moving with increasing acceleration.Answer:BDiff: 0Type: MC29)A car travels at 15 m/s for 10 s. It then speeds up with a constant acceleration of 2.0 m/s2for 15 s.At the end of this time, what is its velocity?29)A)375 m/sB)30 m/sC)15 m/sD)45 m/sAnswer:DDiff: 0Type: MC30)A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of thefollowing statements about the direction of the velocity and acceleration of the ball as it isgoing upis correct?30)A)Its velocity points downward and its acceleration points upward.B)Its velocity points upward and its acceleration points downward.C)Both its velocity and its acceleration points downward.D)Both its velocity and its acceleration point upward.Answer:BDiff: 0Type: MC5

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31)Car A is traveling at22.0m/s and car B at29.0m/s. Car A is 300 m behind car B when the driver ofcar A accelerates his car with a uniform forward acceleration of2.40m/s2.How long after car Abegins to accelerate does it take car A to overtake car B?31)A)5.50 sB)316 sC)12.6 sD)19.0sE)Car A never overtakes car B.Answer:DDiff: 3Type: MC32)An airplane needs to reach a forward velocity of203.0km/hto take off. On a2000-mrunway, whatis the minimum uniform acceleration necessary for the plane to take flight if it starts from rest?32)A)1.0m/s2B)0.79m/s2C)0.87m/s2D)0.95m/s2Answer:BDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.33)A soccer ball is released from rest at the top of a grassy incline. After6.4seconds the ballhas rolled91m with constant acceleration, and 1.0 s later it reaches the bottom of theincline.(a) What was the ball's acceleration?(b) How long was the incline?33)Answer:*a)4.4m/s2(b)120mDiff: 0Type: SAMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.34)The figure shows a graph of the positionxof two cars, C and D, as a function of timet.According to this graph, which statements about these cars must be true? (There could be morethan one correct choice.)34)A)Both cars have the same acceleration.B)At timet=10 s, both cars have the same velocity.C)The magnitude of the acceleration of car C is less than the magnitude of the acceleration of carD.D)The cars meet at timet=10 s.E)The magnitude of the acceleration of car C is greater than the magnitude of the acceleration ofcar D.Answer:A, DDiff: 0Type: MC6

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35)Which of the following graphs represent an object at rest? (There could be more than one correctchoice.)35)A)graph aB)graph bC)graph cD)graph dE)graph eAnswer:ADiff: 0Type: MC36)A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for thetrip?36)A)90 km/hB)88 km/hC)92 km/hD)85 km/hAnswer:BDiff: 0Type: MCSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.37)A car with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0m/s2when braking. If a car is initially traveling at 55 mi/h(a) how much time does it take the car to stop?(b) what is its stopping distance?37)Answer:(a) 4.9 s(b) 60 mDiff: 0Type: SA7

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