I RIS Hmehork is uuewhen you cohe to lab the week of September 17 For this homew
ID: 1880022 • Letter: I
Question
I RIS Hmehork is uuewhen you cohe to lab the week of September 17 For this homework, fill in the blanks on this page; show your work on a separate sheet. Thomas, Richard, and Harold each measure the mass of a rectangular object. Their results are shown in the table below. Calculate the mean, variance, and standard deviation of the mass. Refer introduction in your manua do these calculations, but for credit, you must show your work. (10 pts each) to the I for the appropriate equations. While some calculators will automatically Trial Thomas Richard Harold Mean Variance Mass (g) 545.67 543.38 541.15 Bob, Bing, Eddie, Bud, and Lou measure the height, width, and length of the object. Their results are shown in the table below. Calculate the mean, variance, and standard deviation of the height, width, and length. Refer to the introduction in your manual for the appropriate equations. You do not have to show your work but may use your calculator. (5 pts each) Trial Bob Width (cm) 5.9 6.1 6.0 5.7 Height (cm) 1.9 2.2 2.1 1.9 3.6 3.8 3.9 3.9 4.1 Bud Lou Eddie Mean Variance Std. Dev Humphrey calculates the volume of the object. What volume did he calculate? Show your work for credit. (10 pts) Stanley and Oliver next calculate the density of the object in g/cm. Show your work for credit. (10 pts) Identify the metal. (5 pts) What value did they calculate?Explanation / Answer
Humphrey will calculate volume using the mean values of length , width and height,
Volume = 3.86 x 5.96 x 2 = 46.01 cubic cm.
Stanely and Oliver will calculate density using the above value of volume and mean value of mass,
Density = mass/volume = 543.4/46.01 = 11.81 g/cubic cm.
There will also be some uncertainty with these measurements,but that is not asked in the question.
Thallium (11.85) is nearest to this density.
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