Chemistry, 20.06.2020 22:57 smartie80

In many methods that employ multiple measurements, one particular type of measurement may be the "weak link that limits overall precision. For the density measurements you made here, you will determine what contributes most to the CV of your calculated density - the measurements of mass or of dimensions. Typical standard deviation for length and mass using the equipment employed are the following: Dimensions: 0.01 cm
Mass: 0.0029
Diameter (cm): 1.12
Height (cm): 1.69
Mass (cm): 4.020
Volume (cm3): 1.66
Density (g/cm3): 2.42
Select the data for your lightest object focusing on its mass and its shortest dimension.
A. What is the CV for the mass value?
B. What is the CV for the measurement of its shortest dimension?
C. Which type of measurements (mass or dimensions) had the greatest impact on the CV of the measured density?
1. Mass measurements have the greater impact because the mass CV with lightest object was greater than its dimension CV.
2. Mass measurements have the greater impact because the mass CV with lightest object was lesser than its dimension CV.
3. Dimension measurements have the greater impact because the dimension CV with lightest object was greater than its mass CV.
4. Dimension measurements have the greater impact because the dimension CV with lightest object was lesser than its mass CV.

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