Laboratory 3 Metric Measurements Use the thermometer to measure the following SR
ID: 191068 • Letter: L
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Laboratory 3 Metric Measurements Use the thermometer to measure the following SRoom temperature Human body temperature (gently hold the thermometer bulb in your hand) Part 4. Mass, volume, and density The density of a substance is the relationship between its mass and its volume. In other words, how much of it there is (mass) compared to how much space it takes up (volume) If there's a lot of mass packed into a small space, that substance has high density. Gold is a highly dense substance. The gold bars that you see in the movies has a mass of 12.4 kg (one kg is roughly 2.2 pounds) We can calculate the density of an object by measuring its mass (g) and volume (ml). density = mass volume SCalculate the density of water Step 1. Carefully measure 50 ml of water using a graduated cylinder Step 2. Record the mass of a cup/beaker Step 3. Pour the water into the cup/beaker and record the new mass Step 4. Record the mass of just the water Step 5. Use the formula to calculate density Next calculate the density of a rock (or marble). The mass is easy to obtain but how can we (Step 3 minus Step 2) (the unit of density is g/ml) measure volume? We use the fact that the rock, when put in water, will push out or displace exactly the volume of water that the rock occupies. Step 1. Record the mass of the rock Step 2. Fill a graduated cylinder about halfway. Record the volume Step 3. Submerge the rock in the cylinder. Record the new volume Step 4. Record the volume of just the rock Step 5. Use the formula to calculate density Step 3 minus Step 2) (the unit of density is g/ml) The water does not have enough density to support the rock and so it sinks in waterExplanation / Answer
Human body temperature = 37 degrees Celsius
Room temperature = 27 degrees Celsius
Part 4:
Density = Mass/Volume
Volume of water = 50 mL
Mass of cylinder = 25 g
Mass of cylinder with water = 75 g
Density of water = (75 -25)/50 = 1 g/mL
Mass of rock = 20 g
Volume of cylinder half filled with water = 50 mL
Volume of cylinder after the rock is submerged in water = 60 mL
VOlume of the rock = 60 - 50 = 10 mL
Density of rock = 20/10 = 2 g/mL
Since the density of the rock is greater than the density of water, it sinks in water.
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