Archimedes
•287BC -212BC •Greatest mathematician and scientist of antiquity •Discovered method to help determine the volume of irregularly shaped objects The Archimedes’ Principle •Noticed when he stepped into his bath the water level rose. •Understood that the volume of water displaced must be equal to the volume of the part of his body he submerged. Volume •The amount of space an object takes up. •Measured with a graduate. •Units - liter, milliliters Displacement The difference between the initial volume (110ml) and the volume after an object is submerged (175 ml). V = V2 – V1 •Initial volume – V1 = 20 ml •Final volume – V2 = 23 ml •Volume of object V = 3 ml Mass •The amount of matter in an object. •Measured with a triple beam balance or a scale. •Units – grams, milligrams Density •Measure of how compact a substance is in a given volume. •The more molecules in a given volume the greater the density. •The fewer molecules in a given volume the less the density. How do you calculate density? Density = Mass/Volume Units – g/ml or g/cm3 What careers may use density? •Geologist - to identify minerals. •Chemical Engineers - to identify liquids and other substances. •Ship builders -to determine if ship will float. Comments are closed.
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Erik E. Mason
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