The accepted density of water at room temperature is approximately 1.0 g/mL. Melody and Margaret were told by their professor to measure 7.0 mL of water, which should theoretically weigh 7.0 grams. They first measured the volume of water in a graduated cylinder to be 7.0 mL and then the students weighed the water and they obtained a mass of 6.85 grams. First, calculate the density of their sample of water and then calculate their percent error for density.
1 The accepted density of water at room temperature is approximately 1.0 g/mL. Melody and Margaret were told by their professor to measure 7.0 mL of water, which should theoretically weigh 7.0 grams. They first measured the volume of water in a graduated cylinder to be 7.0 mL and then the students weighed the water and they obtained a mass of 6.85 grams. First, calculate the density of their sample of water and then calculate their percent error for density.
2. A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 meters/second. The teacher informs them that the actual velocity is 34.15 meters/second. Will Jennifer and Johnny pass their final project.
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