Chapter 1—Physics and Measurement MULTIPLE CHOICE
1. Which of the following following products of ratios gives the conversion factor factor to convert convert miles per hour to meters per second a.
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b. c. d. e. ANS: D
PTS: 2
DIF:
Average
2. The den densit sity y of an obje object ct is defi define ned d as: a. the the volume volume occu occupie pied d by each each unit unit of mass mass.. b. the amount of mass for each unit unit of volume. c. the the weigh weightt of each each unit unit of of volu volume. me. d. the amount amount of of the subst substance ance that that has has unit unit volume volume and unit unit mass. mass. e. the amount amount of the the substance substance that that contain containss as many particl particles es as 12 grams grams of the the carbon-12 carbon-12 isotope. ANS: B
PTS: 1
DIF:
Easy
3. If you drove drove day and and night without without stopping stopping for one year without without exceeding exceeding the legal legal highway speed limit in the United States, the maximum number of miles you could drive would be closest to: a. 8 700. b. 300 000. c. 500 000. d. 1 000 000. e. 32 000 000. ANS: C
PTS: 2
DIF:
Average
4. The term occurs occurs in Bernoulli' Bernoulli'ss equation equation in Chapter Chapter 15, with ρ being the density of a fluid and v its speed. The dimensions of this term are a. M 1L5T2 b. MLT2 c. ML 1T 2 d. M 1L9T 2 e. M 1L3T 2 −
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ANS: C
PTS: 2
DIF:
Average
5. Which Which of the followin following g quantiti quantities es has the same dimension dimensionss as kinetic kinetic energy, energy, 2 1 Note: [a [a] = [ g g ] = LT ; [h [h] = L and [v [v] = LT . a. ma b. mvx c. mvt d. mgh e. mgt −
ANS: D
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PTS: 2
DIF:
Average
6. The quant quantity ity with with the the same same units units as force force times times time, time, Ft , with dimensions MLT 1 is a. mv b. mvr c. mv2r d. ma e. −
ANS: A
PTS: 2
DIF:
Average
7. The equatio equation n for the the change change of posit position ion of of a train train starting starting at at x = 0 m is given by dimensions of b of b are 3 a. T b. LT 3 c. LT 2 d. LT 1 e. L 1T 1
. The
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ANS: B
PTS: 2
DIF:
Average
8. One mole mole of of the carbon-12 carbon-12 isoto isotope pe contains contains 6.022 × 1023 atoms. What volume in m 3 would be needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side? a. 4.8 × 1018 b. 1.2 × 1022 c. 6.0 × 1023 d. 1.2 × 1024 e. 4.8 × 1024 ANS: A
PTS: 2
DIF:
Average
9. Which of the following following products of ratios gives the conversion factors factors to convert convert meters per second to miles per hour a. b. c.
?
d. e. ANS: D
PTS: 2
DIF:
Average
10. One U.S. fluid gallon contains contains a volume volume of 231 231 cubic inches. inches. How many many liters of gasoline gasoline would you +3 3 have to buy in Canada to fill a 14-gallon tank? (Note: 1L = 10 cm .) a. 53 b. 21 c. 14 d. 8.0 e. 4.0 ANS: A
PTS: 3
DIF:
Challenging
11. At the end end of a year, a motor car company company announ announces ces that sales sales of a pickup pickup are down 43% 43% for the year. year. If sales continue to decrease by 43% in each succeeding year, how long will it take for sales to decrease to zero? a. 1 year b. 2 years c. 3 years d. 4 years e. More More than than four four year yearss ANS: E
PTS: 2
DIF:
Average
12. John and Linda are arguing arguing about the definition definition of density. density. John says the density of an object is pro portional to its mass. mass. Linda says the object's object's mass is proportional to its its density and to its volume. volume. Which one, if either, is correct? a. They They are are bot both h wro wrong ng.. b. John is correct, but Linda Linda is wrong. c. John John is wrong wrong,, but Linda Linda is is corre correct. ct. d. They They are are bot both h cor corre rect ct.. e. They They are free free to rede redefin finee densit density y as they they wish. wish. ANS: D
PTS: 1
DIF:
Easy
13. Spike claims that dimensional dimensional analysis analysis shows shows that the correct correct expression for change in velocity, velocity, , is
, where m is mass, t is t is time, and F and F is is the magnitude of force. Carla says that
can't be true because the dimensions of force are a. Spike, because
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b. Spike, because
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c. Carla, because
.
. Which one, if either, is correct?
d. Carla, because
.
e. Spike, because the dimensions of force are ANS: C
PTS: 2
DIF:
. Average
14. Which Which one of the quantiti quantities es below below has dimensio dimensions ns equal to a. mv b. mv2 c.
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d. mrv e.
ANS: C
PTS: 2
DIF:
Average
15. The standar standard d exam page is is 8.50 inches inches by by 11.0 inches inches.. Its area in in cm 2 is a. 19.5 b. 36.8 c. 93.5 d. 237. e. 603. ANS: E
PTS: 2
DIF:
Average
16. A standard standard exam exam page is 8.5 inches inches by 11 inches. inches. An exam exam that is 2.0 2.0 mm thick has a volume volume of a. 1.9 × 104 mm3. b. 4.7 × 104 mm3. c. 1.2 × 105 mm3. d. 3.1 × 105 mm3. e. 3.1 × 103 mm3. ANS: C
PTS: 3
DIF:
Challenging
17. Which quantity quantity can be converted from the English English system to to the metric metric system by the conversion conversion factor a. b. c. d. e.
? feet feet per per seco econd feet per hour miles iles per per se secon cond miles iles per per hour hour miles iles per per min minu ute
ANS: D
PTS: 2
DIF:
Average
18. 18. The answe answerr to a questi question on is is [MLT [MLT 1]. The question is "What are the dimensions of a. mr ?" ?" b. mvr ?" ?" −
c. ma?" ma?" d. mat ?" ?" e. ?" ANS: D
PTS: 2
DIF:
Average
19. If each frame frame of a motion picture picture film film is 35 cm high, high, and 24 frames frames go by in a second, second, estimate estimate how how many frames are needed to show a two hour long movie. a. 1 400 b. 25 000 c. 50 000 d. 170 000 e. This cannot cannot be determ determined ined withou withoutt knowing knowing how how many many reels reels were used. used. ANS: D
PTS: 2
DIF:
Average
20. One number number has three three significant significant figures figures and another number number has four significant significant figures. figures. If these these numbers are added, subtracted, multiplied, or divided, which operation can p roduce the greatest num ber of significant figures? figures? a. the addition b. the subtraction c. the the mul multi tipl plic icat atio ion n d. the di division e. All the the operati operations ons result result in in the same same number number of signif significant icant figures. figures. ANS: A
PTS: 2
DIF:
Average
21. A rectangle rectangle has a length length of 1.323 1.323 m and a width of 4.16 4.16 m. Using signif significant icant figure figure rules, rules, what what is the area of this rectangle? a. 5.503 68 m2 b. 5.503 7 m2 c. 5.504 m2 d. 5.50 m2 e. 5.5 m2 ANS: D
PTS: 2
DIF:
Average
PROBLEM
22. The standard standard kilogram is a platinum-iridium platinum-iridium cylinder 39 mm in height and and 39 mm in diameter. What is the density of the material? ANS: 21 475 kg/m 3 PTS: 2
D IF:
Average
23. A 2.00 m by 3.00 m plate plate of aluminum aluminum has has a mass of 324 kg. kg. What is the the thickness thickness of the plate? plate? (The 3 3 density of aluminum is 2.70 × 10 kg/m .) ANS: 2.00 cm
PTS: 2
D IF:
Average
24. What is the the mass of air air in a room that that measu measures res 5.0 5.0 m that of water).
×
8.0 m × 3.0 m? (The density of air is 1/800
ANS: 150 kg PTS: 2
D IF:
Average
25. The basic function of a carburetor of an automobile automobile is to to atomize the the gasoline and mix it with air to 3 promote rapid combustion. combustion. As an example, assume that 30 cm of gasoline is atomized into N spherical droplets, each with a radius of 2.0 × 10 5 m. What is the total surface area of these N spherical droplets? −
ANS: 45 000 cm 2 PTS: 3
D IF:
Challenging
