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Metric Notes

Metric Notes. Chem 332 – O’Dette. Why Care About Units?. On 9/23/99, $125,000,000 Mars Climate Orbiter entered Mars’ atmosphere 100 km lower than planned and was destroyed by heat. What happened?. 1 lb = 4.45 N.

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Metric Notes

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  1. Metric Notes Chem 332 – O’Dette

  2. Why Care About Units? • On 9/23/99, $125,000,000 Mars Climate Orbiter entered Mars’ atmosphere 100 km lower than planned and was destroyed by heat. What happened? 1 lb = 4.45 N CNN - NASA lost a Mars orbiter because one engineering team used metric units while another used English units for a key spacecraft operation 1 lb = 1 N X 1 lb = 4.45 N

  3. Units of Measurement English System “Original System” Metric System France, 1795 SI – The International System of Units, 1960 Length ft, in, yd, mile meter meter Volume liter m3 gal, qt, pt, cup Mass lb gram kilogram Temperature °F °C K second second second Time

  4. Metric System • The advantage to using this system is that units are based on multiples of 10 kilo (k) 1000 hecto (h) 100 deka (da) 10 deci (d) 0.1 centi (c) 0.01 milli (m) 0.001 (1/10) (1/100) (1/1000) *** Meter Stick

  5. Examples Working with a partner, find the conversions. • 1 m = ______ decimeters • 1000 mg = ______ grams • 1 L = ______ milliliters • 160 cm = ______ millimeters • 14 km = ______ meters 10 1 1000 1600 14000

  6. Other Prefixes

  7. The Kilogram Video

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