you and your lab partner are asked to determine the density of an aluminum bar. the mass is known accurately to 4 significant figures. you use a simple metric ruler to determine its size and calculate the results in column a. your partner (using a precision micrometer for the first time) obtains the results in column b. (the accepted density of aluminum is 2.702 g/cm3.)

method a results (g/cm3) method b results (g/cm3)

2.2 2.603

2.3 2.601

2.7 2.605

2.4 2.611

calculate the average density for each method.

Average density for method A = 2.4 g/cm³

Average density for method B = 2.605 g/cm³

Explanation:

In order to calculate the average density for each method, we need to add the data for each method, and then divide the result by the number of measurements (in this case is 4 for both methods):

Σ = 2.2 + 2.3 + 2.7 + 2.4 = 9.6

Average = 9.6/4 = 2.4 g/cm³

Σ = 2.603 + 2.601 + 2.605 + 2.611 = 10.420

Average = 10.420/4 = 2.605 g/cm³

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .