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Unformatted text preview: Prof. Matt Dobbs Page 1/4 Physics 257 Asst 0 Physics 257: Assignment 0 Answer Key Due inclass before 1:05pm Thursday September 13, 2007 Remember to use the correct number of significant figures for your answers. For plots, remember to label your axes correctly and use the “graphs” checklist on page 7 of the lab book. 1. (This problem must be done by hand without the use of a computer for the calculations) A low temperature physicist measured the temperature of her cryostat five different times and found (degrees Kelvin) 4.09, 4.11, 4.23, 4.12, 4.17 a. Write the equation for the arithmetic mean. What is the mean temperature of the cryostat? (1 point) ∑ = = N i i x N x 1 1 = (4.09 + 4.11 + 4.23 + 4.12 + 4.17) /5 = 4.1440 = 4.14 (do not subtract marks for sig figs here so long as the student uses at least 3.) b. Write the equation for the standard deviation. What is the standard deviation of the measurements? (1 point) 1 ) ( 2 − − = ∑ N x x s i i = (student must write out equation) = 0.0564 (do not subtract marks for sig figs here so long as the student uses at least 2.) c. Write down the best estimate of the cryostat’s temperature in Kelvin and milliKelvin...
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This note was uploaded on 04/29/2008 for the course MATH 223 taught by Professor Loveys during the Fall '07 term at McGill.
 Fall '07
 Loveys
 Linear Algebra, Algebra

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