Physical Chemistry Solutions 3

Physical Chemistry Solutions 3 - you can state this result...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
8 Propagation of errors These two exercises will provide some practice in unit conversion and combining errors. You may work with others in your group, but you must do the calculations yourself and hand in your own work. Write down all the data you use and show the key steps in your calculation. 1. Assume that the length of the Appalachian trail is 2100±100 miles. Look up the value of the average stride length you measured during Workshop 1, and use ½ the range in your measured values as the uncertainty (e.g., if you measured stride lengths ranging from 1.2 to 1.5 m, with an average 1.37 m,
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: you can state this result as 1.37±0.15 m). Now calculate the number of strides it takes to walk the trail from start to finish and estimate the uncertainty on this number. Be careful with units and significant figures. 2. The mass of a particular sample of rock retrieved from Mars is m = 772.2 ± 0.2 g. The sample is in the shape of a cylinder of height h = 10 ± 0.1 cm and base radius r = 2.5 ± 0.1 cm. Calculate the density of the rock sample in units of kg m-3 . You must state your result in the correct units with its associated uncertainty. The volume of a cylinder is V = π r 2 h....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online