HW Ch. 1
Measurement and Mathematics
Chapter 1: Measurement and Mathematics
Conceptual problems
1.C.3
(5.00)
You take two measurements in a lab. The first measurement is in units called
zorbs. The second measurement is in different units called zargs. Both zorbs
and zargs have the same dimensions. Can you directly add these
measurements together? If not, what additional information do you need in order
to add them?
NO
Yes No
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(0/3 submissions used)
1.C.4
(5.00)
When multiplying by a conversion factor, how do you determine which unit
belongs in the numerator and which in the denominator?
The top numerator represents the equal parts; where as, the bottom
denominator makes up for the parts as a whole. When working with conversion
factors, the units to be cancelled out, should be represented in both the top
numerator and bottom denominator so that the desired outcome would be
represented in the end result.
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1.C.5
(5.00)
The following variables are commonly seen in equations. The name of the
quantity represented by each variable, and its dimension(s), are also shown.
x
distance (L)
t
time (T)
m
mass (M)
a
acceleration (L/T
2
)
v
speed (L/T)
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force (ML/T
2
)
Using the information above, check the boxes of the equations that are
dimensionally correct.
Select all that apply.
F
=
ma check
v
2
=
2
ax false
v
=
at
2
F
/
v
=
m
/
t
check
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1.C.9
(5.00)
Consider the sine and cosine functions. (a) As an angle increases from 0° to
90°, does the sine of the angle increase or decrease? (b) How about the cosine?
(a) Increases Decreases
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sine
dec
(b) Increases Decreases
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cosine incre
1.C.1
0
(5.00)
You walk along the edge of a large circular lawn. You walk clockwise from your
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 Spring '08
 Broyles
 Trigonometry, Scientific Notation, heart rate, submissions

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