PHYSICS FOR SCIENTISTS AND ENGINEERS 9TH EDITION BY SERWAY - Test Bank

,Chapter 1—Physics and Measurement


MULTIPLE CHOICE



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.


ANS: D PTS: 2 DIF: Average

2. The density of an object is defined as:
a. the volume occupied by each unit of mass.
b. the amount of mass for each unit of volume.
c. the weight of each unit of volume.
d. the amount of the substance that has unit volume and unit mass.
e. the amount of the substance that contains as many particles as 12 grams of the carbon-12
isotope.
ANS: B PTS: 1 DIF: 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:
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 in Bernoulli's equation in Chapter 15, with  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
ANS: C PTS: 2 DIF: 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.
a. ma
b. mvx
c. mvt
d. mgh
e. mgt
ANS: D PTS: 2 DIF: Average

6. The quantity with the same units as force times time, Ft, with dimensions MLT1 is
a. mv
b. mvr
c. mv2r
d. ma
e.


ANS: A PTS: 2 DIF: 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. LT2
d. LT1
e. L1T1
ANS: B PTS: 2 DIF: Average

8. One mole of the carbon-12 isotope contains 6.022  1023 atoms. What volume in m3 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 products of ratios gives the conversion factors to 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 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 cm3.)
a. 53
b. 21
c. 14
d. 8.0
e. 4.0
ANS: A PTS: 3 DIF: 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?
a. 1 year
b. 2 years
c. 3 years
d. 4 years
e. More than four years
ANS: E PTS: 2 DIF: 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?
a. They are both wrong.
b. John is correct, but Linda is wrong.
c. John is wrong, but Linda is correct.
d. They are both correct.
e. They are free to redefine density as they wish.
ANS: D PTS: 1 DIF: 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 .