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Straighter line General Physics I (EXAM ONE) with 100- correct answers
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Straighter line General Physics I (EXAM ONE) with 100- correct answers
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Straighterline:
General
Physics I
(EXAM
ONE) with
100%
,correct
answers
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. The value of a conversion factor is
essentially 1. - answer 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 - answer D
An SI unit is a Systeme Internacionale unit. In
most cases, an SI unit is an mks unit or is
derived from mks units.
Suppose you are told that 15 quarts (qt) =
14.2 liters (L). What is the conversion factor
you would use to convert from quarts to
liters? What is the conversion factor you
would you use to convert liters to quarts?
A. quarts to liters: 14.2 L / 15 qtliters to
quarts: 15 qt / 14.2 L
B. quarts to liters:15 qt + 14.2 Lliters to
quarts: 29.2 qt / L
C. quarts to liters: 15 qt / 14.2 Lliters to
quarts: 1.06 qt / L
D. quarts to liters: 15 qt • 14.2 Lliters to
quarts: 213 qt / L - answer A
Suppose you have $100 that you need to
convert to Danish kroner. The conversion rate
, that day is 5.732 Danish kroner for one
American dollar. The business that converts
your money charges you a flat fee of 50
Danish kroner for the transaction. Use your
knowledge of 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 kroner
D. 573 Danish kroner - answer C
The number that determines the number of
significant figures is the conversion factor: 1
American dollar per 5.732 Danish kroner.
There are four significant figures in 5.732.
You 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 figure.
You make 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
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