151-Density-kitchen lab - Density In this lab we will...

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Density In this lab we will explore common methods for measuring density, mass per volume. Density = Mass Volume With liquids, one can simply measure the mass with a balance, the volume with a graduated cylinder (or, for this lab, a measuring cup), and take the ratio of the two. For solids objects, if it’s a simple shape, you might be able to determine its volume by measuring its size and find it’s volume mathematically. The volume of a rectangular object, for example, could be found by multiplying its length, width and height. With a cylinder, you could measure the radius and height and use the equation V = π r 2 h An alternate method for measuring volume, which is especially useful when the shape is irregular, is an indirect method known as water displacement , where you place the object in a known volume of water. This will cause the water level to increase by a volume equal to that of the object. Materials required Kitchen scale Measuring Cup* Ruler* Tap water One of the following: vegetable oil, corn syrup, or motor oil One of the following: sugar, table salt, or starch Any rectangular or square-shaped paperback book that weighs less than 500 grams 50-75 pennies** *Preferably one with metric units; otherwise you’ll have to look up the appropriate conversions. **If you don’t keep a lot of change around, get a couple rolls of pennies (a dollar) from your nearest bank. Other types of coins can be substituted, though the number required may vary.
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Procedure Part A – Finding the density of liquids 1. Measure 100-250mL of tap water. 2.
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This note was uploaded on 01/31/2011 for the course BIOLOGY LE 49610 taught by Professor Hofmannjohann during the Spring '10 term at University of Texas at Austin.

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151-Density-kitchen lab - Density In this lab we will...

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