You and your lab partner are asked to determine the density of an aluminum bar. the mass is known accurately (to four significant figures). you use a simple metric ruler to determine its size and calculate the results in
a. your partner uses a precision micrometer and obtains the results in
b. method a (g/cm3 ) method b (g/cm3 ) 2.2 2.703 2.3 2.701 2.7 2.705 2.4 5.811 the accepted density of aluminum is 2.702g/cm3 .
a. calculate the average density for each method. should all the experimental results be included in your calculations? if not, justify and omissions.
b. calculate the percent error for each methodâs average value.
c. which methodâs average value is more precise? which method is more accurate?
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