Metric System

1
Metric System
2
SI System

• Standard International System of measurement
  metrics
• Has seven base units and many other units derived
  from these seven

3
Seven Base Units
4
Mass vs Weight

• Mass is not the same as weight
• Mass is the amount of matter in a substance
• Weight is a measure of the pull of gravity on the
  substance
• Can you be weightless? Can you be massless?

5
Derived Units

• Many other units are used in the metric system,
  but they are combinations of the base units
• Speed - meter per sec (m/sec)
• Volume
• - volume length x width x height
• (m) x (m) x (m) m3
• - .001 m3 1 liter (L)
• - 1 cm3 1ml

6
Prefixes

• Metric system utilizes prefixes which indicate
  multiples of 10 of the unit
• kilo- k 1000
• hecto- h 100
• deka- da 10
• deci- d .1
• centi- c .01
• milli- m .001

7
Converting Between Metric Units

• 3.65 dam __________cm
• 2587 mm __________hm
• .0087 hl __________cl

8
More Prefixes (see front cover)

• Mega- M 106
• Micro- u 10-6
• Nano - n 10-9
• Pico- p 10-12

9
Use the appropriate prefixes

• 3 x 106 L
• 15 x 10-9 g
• 8 x 108 m
• 3.5 x 10-6 A
• 1.46 x 1010 J

10
Temperature

• Metric unit Kelvin not used for measurement
• Measured in ?C (celsius)
• K ?C 273.15
• Old system is ?F (farenheit)
• C 5/9 (F -32)
• What is 69 ?F in ?C and K?