Density and Specific Gravity - Practice Problems
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Calculating densities of rocks and minerals
Problem 1: You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density?
Problem 2: You have a different rock with a volume of 30cm3 and a mass of 60g. What is its density?
Problem 3: In the above two examples which rock is heavier? Which is lighter?
Problem 4: In the above two examples which rock is more dense? which is less dense?
Problem 5: You decide you want to carry a boulder home from the beach. It is 30 centimeters on each side, and so has a volume of 27,000 cm3. It is made of granite, which has a typical density of 2.8 g/cm3. How much will this boulder weigh?
Calculating Specific Gravity of Rocks and Minerals
Problem 8: You have a sample of granite with density 2.8 g/cm3. The density of water is 1.0 g/cm3. What is the specific gravity of your granite?
Problem 9: You have a sample of granite with density 174.8 lbs/ft3. The density of water is 62.4 lbs/ft3. What is the specific gravity of the granite now?
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