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3.7 Metric and English Conversion

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3.7 Metric and English Conversion. In technical work, you must at times change ... conversion factors are given in the Metric and English Conversion Table on ... – PowerPoint PPT presentation

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Title: 3.7 Metric and English Conversion


1
3.7 Metric and English Conversion
2
In technical work, you must at times change from
one system of measure to the other. The
approximate conversion factors are given in the
Metric and English Conversion Table on your
reference card. Often there is more than 1 way to
convert from one system to the other, causing a
slight difference in the results. This small
difference is acceptable.
3
In this section round to 3 significant digits
when necessary. Significant digits are covered in
section 1.11 page 63. Significant digits are
those digits in a number we are reasonable sure
of being able to rely on in a measurement.
4
The following digits in a number are significant
  • All nonzero digits (258 has 3 sig.dig.)
  • All zeros between sig.dig. (2007 has 4)
  • All zeros at the end of a decimal number (2.000
    and 0.04500 have 4 sig.dig.)

5
The following zeros are not significant
  • All zeros at the beginning of a decimal less than
    1 (0.00775 has 3 sig.dig.)
  • All zeros at the end of a whole number (3600 has
    2 sig.dig.)

6
The conversions are made using dimensional
analysis like in the section on English
conversions. This involves multiplying the value
to be converted by a factor of one that relates
the quantities.
7
Change 17 in to centimeters.
8
Change 1950 g to pounds.If you choose a
different conversion factor the answer may be
slightly different.
9
Change 0.85 qt to mL. Sometimes you may need to
make more than one conversion.
10
How many square inches are in a metal plate 14 sq
cm in area?
11
How many cubic yards are in 12 cubic meters?
12
How many acres are in a field that measures 1350
ft by 2750 ft?
13
How many hectares are in a field that measures
1350 ft by 2750 ft?
14
Change 165 lb/sq in to kg/sq cm
15
A soybean yield of 45 bu/acre is equivalent to
how many kg/ha?(1 bu soybeans weighs 60 lbs)
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