Straighter line: General Physics exam with correct answers 2024
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Straighter line: General Physics I
Institution
Straighter Line: General Physics I
Which of the following statements related to conversion factors is false?
A. A conversion factor is the ratio of the given unit to the required unit.
B. A conversion factor does not necessarily convert to standard SI units.
C. The expression 60 min / hour is an example of a conversion factor.
D...
Which of the following statements related to conversion factors
is false?
A. A conversion factor is the ratio of the given unit to the
required
B. unit. factor does not necessarily convert to standard
A conversion
SI units.
C. The expression 60 min / hour is an example of a
conversion
D. The value factor.
of a conversion factor is essentially 1. correct
answers A
What are SI
units?
A. Standard Index units of
measurement
B. Units from the old English measurement
system
C. International time
units
D. Systeme International units of measurement correct
answers
An SI unitDis a Systeme Internacionale unit. In most cases, an SI unit is an
mks unitfrom
derived or ismks
units.
Suppose you are told that 15 quarts (qt) = 14.2 liters (L). What is the
conversion
you would use factor
to convert from quarts to liters? What is the conversion factor
would
you use to convert liters to
quarts?
A. quarts to liters: 14.2 L / 15 qtliters to quarts: 15 qt
/ 14.2
B. L to liters:15 qt + 14.2 Lliters to quarts:
quarts
29.2
C. qt / Lto liters: 15 qt / 14.2 Lliters to quarts:
quarts
1.06
D. qt / Lto liters: 15 qt • 14.2 Lliters to quarts: 213 qt / L correct
quarts
answers A
Suppose you have $100 that you need to convert to Danish kroner. The
conversion
that rate Danish kroner for one American dollar. The business
day is 5.732
that converts
your money charges you a flat fee of 50 Danish kroner for the
transaction.ofUse
knowledge your
significant figures to decide which of the following shows
the correct
amount of Danish kroner that you should
receive.
A. 573.2 Danish
kroner
B. 500 Danish
kroner
C. 523.2 Danish
D. 573 Danish kroner correct
kroner
answers
The numberC that determines the number of significant figures is the
conversiondollar
American factor: 1 5.732 Danish kroner. There are four significant
per
figures
You in 5.732.
assume that the 100 and the 50 are precise figures, and therefore not
considered
when determining the number of significant
figures.
Suppose you are asked to determine the perimeter of a seven-sided
irregular
You makefigure.
the following measurements:Side 1 = 3.2 mSide 2 = 4.8 mSide
3 = 2.000
mSide 4 = 8.94 mSide 5 = 11 mSide 6 = 7.566 mSide 7 = 4.0 m How
many significant
figures should there be in your calculation for the
perimeter?
, a. one significant
figure
b. two significant
figures
c. three significant
figures
d. four significant figures correct
answers
The addingB rule states that when adding numbers you should use the
number of
decimal places from the number that has the fewest decimal place digits.
In this
that case, is 11, which has no digits after the decimal point. The sum of
number
the sides
36.9, whichis should be rounded to 40., where the zero is a
significant digit.
An object travels a distance d with acceleration (a) over a period of time (t)
according to
the
equation:
d=(1/2) at^2. After 2.3 seconds with an acceleration of 9.8 m/s, how far
does an object
travel
?
a. d=(1/2)at^2=(1/2)(9.8m/s^2)
(2.3s)^2=
b. 26m
d=(1/2)at^2=(1/2)(9.8m/s^2)
(2.3s)^2= 11m
c. (1/2)at^2=(1/2)(9.8m/s^2)(2.3s)^2
= 26m/s
d. None of the above. correct
answers A
Which of the following uses a derived SI unit
measurement?
a.
time
b.
speed
c.
distance
d. mass correct
answers b
The circumference of a circle is defined by the equation C=2πr, where
π=3.14.
that Suppose
r = 0.0347
m.
Which of the following correctly shows the circumference of
theCcircle?
a. = 0.378
m2
b. C = 0.237916
c. C = 0.2
m
m
d. C = 0.218 m correct
answers d
Which of the following statements about SI distance units is not
correct?
a. Both a meter and a kilometer are SI
units.
b. A mile is not an SI
c. A meter currently has a universal unit
unit.
definition.
d. Converting a meter to feet is an example of a conversion involving two
different
units SI
for distance. correct
answers d
Which of the following does not explain the use of SI units in
physics?
a. SI units have been universally accepted as the standard by the scientific
community.
b. SI units are more difficult to manipulate than old English system units
(suchand
foot as the
pound).
c. Physicists are able to measure complicated quantities using
mks units.
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