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| Specific gravity is the density of material divided by the density of water. In part I of the lab you measured the density of water, now you will measure the densities of two materials and calculate their specific gravity's in this part of the lab. |
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As we already saw in Part I, two pieces of information are needed to calculate density: mass and volume of a sample of matter. Now the samples are metal cylinders (or slugs). You will check two of these slugs out of the stockroom. Make sure that you record on line 15 of the data sheet which slugs you have. |
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| This is the first section of Part II of the Comparison of the Properties of Two Objects lab. Both slugs need to have their masses measured. To measure the mass, place the slug on the balance and record the mass to the nearest thousandth of a gram. This would be the milligram place. |
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The mass of the slug shown here is 43.800 grams. As you can see in the picture above that the mass of the slug is 43.799 grams, this is okay because it is the milligram place which is fluctuating and can be expected because of the built in error in the balance. |
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| Now you are ready to measure the length and diameter of the slugs using a Vernier caliper. These measurements will help you to calculate the volume of each slug. |
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