Tuesday, March 5, 2013

2/27 Fluid Dynamics

Purpose

     The purpose of this experiment was to determine the time required to partially empty the water inside a bucket through a small hole on its bottom. The Bernoulli equation was applied to calculate the theoretical time to partially empty the bucket. The percent error was calculated to determine the uncertainties and perform error analysis.

Experiment

 
1. Set up: a bucket with a small hole was placed on the edge of the table
 
 
2. Once the set up is ready, the tape was removed to allow the water pour into the beaker and started timing. Once 200 mL of water was collected in the beaker, stopped timing and pasted the tape.
 
Data and Calculation
 
 
Conslusion

 
     The data was outside the allowlable range of errors, and they were off by a factor of two. Possible errors could be: the diameter of the hole was not small enough to to be applied in the Bernuolli equation; the height of the water was changing as the water being poured out, but we put the height as a constant when calculated the theoretical time; water was spilled during the experiment; after the first trial, the beaker became wet instead of dry, thus affecting the time; there might be an error on timing because of the reaction time. The errors also could be from the design and procedure of this lab.



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