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In some of the CE 428 Experiments you will be using the data collected by other groups in addition to your own data. There will be a page on the web site for that experiment where you can find all the data that have been turned in. For the mock experiment we will assume that you are only using your own data and that your experimental results are as follows: When you weighed the aluminum block you found its mass to be 10.34 g. Method 1: The ruler you used had millimeters as the finest gradations, and you felt that your measurements were precise to within 0.25 mm. The measured values were w = 33.4 mm, h = 15.1 mm and d = 8.0 mm. Method 2: The 50 cc beaker had markings on the side for every 5 cc. You felt that you could read the level of water in the beaker with a precision of 1 cc. The initial volume was 27 cc. Upon dropping the block in (without a splash so that no water was lost from the beaker) the new volume was read as 30 cc. Method 3: When the block was dropped into the beaker the water that overflowed was collected and transferred to a 10 cc graduated cylinder with markings every 0.2 cc. You felt that you could read the volume of liquid in the graduated cylinder with a precision of 0.05 cc. The volume of the collected water was read to be 3.60 cc. Your group met after all the data were collected to discuss the calculations to be performed. Since the analysis was simple, you decided to each perform the analysis yourself and then compare your answers. Specifically, each member will calculate the volume of the block from its density and mass, calculate the volume of the block as measured by each method, and calculate the uncertainty in each of the measured volumes. Your group will meet again on Friday 1/28/00 at 4:00 PM in 262 Capen Hall to discuss the results and to formulate an outline for your oral presentation. |
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last update: 01/25/00
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