Unit 1 -
Measurement +
Estimating
Uncertainty , Significant Figures
No is
absolutely
·
measurement precise
/expected
-
measured
·
Percent Error =
expected
1 :
100 %
Significant figure
·
known
reliably digit in a number
-
·
leading zeros are not
significant (0 0622 sig figs
.
digit
·
the final is the that holds
one
uncertainty
·
multiplying/dividing >
-
inherits # of
digits that the number with less
digits has
11 3 .
:
6 .
8=
adding/subtracting #
·
>
-
inherits of decimal places that the number with less places has
36 + 8 2 .
=
44 .
Converting Units
·
Conversion factor -
I unit = X Units
·
multiply out factors so that units Cancel in the numerator/denominator
ex .
21 inchest am 21 ich .
(m) :
54 6.
Dimension Analysis
·
position
= L,
velocity
=
L/T, acceleration =
/Th
·
units in an equation must balance on both sides
,Unit 1 Hand In HW-#52, 55 65, 68
,
d + R2 =
(r + h)
14 / 2R(1 5)
= 2
(4400m) + = + .
+
(1 5).
1 93
.
.
10 m 3 R =
R =
6 45
.
.
10 'm
2) A = B =* (where v =)
b) A = B = (where v
=)
ghuman lun
=
23
Vice =
17 .
.
100 km2 ·
2 5km
.
=
4 . 25 .
106 km
Searth =
Mir = 4h (6371)
2
=
S1
.
.
100 km2 . 5 =
3 4 100 km2
.
.
4 .
25 .
106 km
Ah =
34 .
.
100 km2 " - 0125km or 12 Sm
.
,Pearson HW.
235 37 2 %
.
.
=
87
, 10-2m kg/m3. 10
1200 cars 4
100 kg
.
= .
Measurement +
Estimating
Uncertainty , Significant Figures
No is
absolutely
·
measurement precise
/expected
-
measured
·
Percent Error =
expected
1 :
100 %
Significant figure
·
known
reliably digit in a number
-
·
leading zeros are not
significant (0 0622 sig figs
.
digit
·
the final is the that holds
one
uncertainty
·
multiplying/dividing >
-
inherits # of
digits that the number with less
digits has
11 3 .
:
6 .
8=
adding/subtracting #
·
>
-
inherits of decimal places that the number with less places has
36 + 8 2 .
=
44 .
Converting Units
·
Conversion factor -
I unit = X Units
·
multiply out factors so that units Cancel in the numerator/denominator
ex .
21 inchest am 21 ich .
(m) :
54 6.
Dimension Analysis
·
position
= L,
velocity
=
L/T, acceleration =
/Th
·
units in an equation must balance on both sides
,Unit 1 Hand In HW-#52, 55 65, 68
,
d + R2 =
(r + h)
14 / 2R(1 5)
= 2
(4400m) + = + .
+
(1 5).
1 93
.
.
10 m 3 R =
R =
6 45
.
.
10 'm
2) A = B =* (where v =)
b) A = B = (where v
=)
ghuman lun
=
23
Vice =
17 .
.
100 km2 ·
2 5km
.
=
4 . 25 .
106 km
Searth =
Mir = 4h (6371)
2
=
S1
.
.
100 km2 . 5 =
3 4 100 km2
.
.
4 .
25 .
106 km
Ah =
34 .
.
100 km2 " - 0125km or 12 Sm
.
,Pearson HW.
235 37 2 %
.
.
=
87
, 10-2m kg/m3. 10
1200 cars 4
100 kg
.
= .
