1Units System •There are many systems of units •When solving problems, use the same system for different quantities. Then covert it to any other systems you want •For this class we use the SI system (International System of Units). •SI •Length – hand, foot, mile,… meter•Time – sundial, water clock, second•Mass –pound, ton, gram… kilogram•Volume – peck, bushel, cup … cubic meter•Area - acre, square mile, hectare square meter1/7/2011
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