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Chapter 1—Physics and Measurement Cengage Learning Testing, Powered by Cognero Page 1 1.Which of the following products of ratios gives the conversion factor to convert miles per hour to meters per second ?a.b.c.d.e.
ANSWER: d
POINTS: 2
DIFFICULTY: Average
2.The density of an object is defined as:
- the volume occupied by each unit of mass.
- the amount of mass for each unit of volume.
- the weight of each unit of volume.
- the amount of the substance that has unit volume and unit mass.
- the amount of the substance that contains as many particles as 12 grams of the carbon-12 isotope.
ANSWER: b
POINTS: 1
DIFFICULTY: Easy
3.If you drove day and night without stopping for one year without exceeding the legal highway speed limit in the United
States, the maximum number of miles you could drive would be closest to:
- 8700.
- 300000.
- 500000.
- 1000000.
- 32000000.
ANSWER: c
POINTS: 2
DIFFICULTY: Average
4.The term occurs in Bernoulli's equation in Chapter 15, with ρ being the density of a fluid and v its speed. The dimensions of this term are Physics for Scientists and Engineers, 10e Raymond Serway, John Jewett (Test Bank All Chapters, 100% original verified, A+ Grade) 1 / 4
Chapter 1—Physics and Measurement Cengage Learning Testing, Powered by Cognero Page 2 a.M− 1 L 5 T 2 b.
MLT 2 c.ML− 1 T− 2 d.M− 1 L 9 T− 2 e.M− 1 L 3 T− 2
ANSWER: c
POINTS: 2
DIFFICULTY: Average
5.Which of the following quantities has the same dimensions as kinetic energy, ?
Note: [a] = [g] = LT−
2 ; [h] = L and [v] = LT− 1 .
- ma
- mvx
- mvt
- mgh
- mgt
ANSWER: d
POINTS: 2
DIFFICULTY: Average
6.The quantity with the same units as force times time, Ft, with dimensions MLT− 1 is
- mv
- mvr
- ma
c.mv 2 r
e.
ANSWER: a
POINTS: 2
DIFFICULTY: Average
7.The equation for the change of position of a train starting at x = 0 m is given by. The dimensions of b are a.T− 3 b.LT− 3 c.LT− 2 d.LT− 1 e.L− 1 T−
1 2 / 4
Chapter 1—Physics and Measurement Cengage Learning Testing, Powered by Cognero Page 3
ANSWER: b
POINTS: 2
DIFFICULTY: Average
8.One mole of the carbon-12 isotope contains 6.022 × 10 23 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 × 10
18 b.
1.2 × 10
22 c.
6.0 × 10
23 d.
1.2 × 10
24 e.
4.8 × 10
24
ANSWER: a
POINTS: 2
DIFFICULTY: Average
9.Which of the following products of ratios gives the conversion factors to convert meters per second to miles per hour ?a.b.c.d.e.
ANSWER: d
POINTS: 2
DIFFICULTY: Average
10.One U.S. fluid gallon contains a volume of 231 cubic inches. How many liters of gasoline would you have to buy in
Canada to fill a 14-gallon tank? (Note: 1L = 10
+3 cm 3 .)
- 53
- 21
- 14
- 8.0
- 4.0 3 / 4
Chapter 1—Physics and Measurement Cengage Learning Testing, Powered by Cognero Page 4
ANSWER: a
POINTS: 3
DIFFICULTY: Challenging
11.At the end of a year, a motor car company announces that sales of a pickup are down 43% for the year. If sales continue to decrease by 43% in each succeeding year, how long will it take for sales to decrease to zero?
- 1 year
- 2 years
- 3 years
- 4 years
- More than four years
ANSWER: e
POINTS: 2
DIFFICULTY: Average
12.John and Linda are arguing about the definition of density. John says the density of an object is proportional to its mass. Linda says the object's mass is proportional to its density and to its volume. Which one, if either, is correct?
- They are both wrong.
- John is correct, but Linda is wrong.
- John is wrong, but Linda is correct.
- They are both correct.
- They are free to redefine density as they wish.
ANSWER: d
POINTS: 1
DIFFICULTY: Easy
13.Spike claims that dimensional analysis shows that the correct expression for change in velocity, , is , where m is mass, t is time, and F is the magnitude of force. Carla says that can't be true because the dimensions of force are . Which one, if either, is correct?a.Spike, because .b.Spike, because .c.Carla, because .d.Carla, because .
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