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Sect2.1 Lab-Density by water displacement-Rubber

Sect2.1 Lab-Density by water displacement-Rubber - Name...

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Name: Period: Date: LAB: Density of a rubber stopper Background Information: Density of an object is equal the mass of an object divided by its volume. d = density (g/cm 3 ) m = mass in grams (g) V = volume (cm 3 ) Mass can be measured by using the balance. Volume can be found by multiplying the length of an object by its height and by its width. However, this method does not work for materials of irregular shape. Another method to find the volume of an irregular object is to use the water displacement. When an object is immersed in water it displaces an amount of water equal to its own volume. A graduated cylinder is generally used as the measuring device. Water is added to the cylinder to a given volume. Then the object is slid down a sloped side so as to avoid splashing out the water. The cylinder must be lightly tapped to remove any trapped air bubbles. The final reading of the cylinder minus the initial reading provides the volume of the object.
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