Conversion of Units

1
Conversion of Units

• Mathematics 11 Chapter 2 Reading ( p19 p24 )

2
Metric Units of Length, Mass and Capacity

• In the International System of Units ( SI ) each
  physical quantity - length, mass, volume, etc is
  represented by a specific SI unit.
• basic unit the metric units of length (metre),
  mass (gram), liquid volume (litre) and
  temperature (degree Celsius).

3
Prefixes

• Larger and smaller multiples of that unit are
  made by adding SI prefixes.
• Prefix is a word or letter written in front of a
  basic metric unit to specify the fraction or
  multiple of the unit.
• The following table shows some examples of these
  units

4
Converting between Metric units

• If converting from a larger unit (eg m) to a
  smaller unit
• (eg cm), check what number of smaller units are
  needed to
• make 1 larger unit, then multiply that number
  with the
• relevant number of the larger units.
• If converting from a smaller unit (eg cm) to a
  larger unit
• (eg m), check what number of smaller units are
  needed to
• make 1 larger unit, then divide that number into
  the
• relevant number of the larger units.

5
Non-Metric Units of Length, Mass and Capacity

• There are some countries that use non-metric
  units (imperial units) more than metric-units.
  Some common imperial units are given below

6
Currency

• Currency is the money used in a country.
  Exchange rates for the Omani Rial on 9-2-2009 are
  given below

7
Conversion Degrees Fahrenheit to or from Degrees
Celsius

• Temperature is the measurement of how hot or cold
  something is. It plays an important role in
  almost all fields of science. It is measured in
  degrees Celsius (ºC).
• In the U.S., it is common to report temperature
  in degrees Fahrenheit (ºF).
• There are other ways to measure temperature but
  we consider here the two Celsius and
  Fahrenheit.
•  

8
Conversion Degrees Fahrenheit to or from Degrees
Celsius

•  
• To convert from Celsius to Fahrenheit one can use
  the relation
•  
• To convert from Fahrenheit to Celsius one can use
  the relation
• Water freezes at 0ºC or 32ºF.
• Body temperature is typically 37ºC or 98ºF