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Metric System

Metric System. SI System. Standard International System of measurement – metrics Has seven base units and many other units derived from these seven. Quantity. Unit. Abbreviation. length. meter. m. mass. gram. g. time.

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Metric System

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  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. Quantity Unit Abbreviation length meter m mass gram g time second s temperature kelvin K amount mole mol current ampere amp intensity candela cd 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 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 10-6L 1.46 x 1010g

  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?

  11. Temperature is an intensive property-does not depend on the amount • Extensive propertiesdo depend on the amount • In the statement “a yellow sample is solid at 25 C. It weighs 6.0g and has a density of 2.3g/cm3” what are the intensive and extensive properties?

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