1 Experiment 1 Measurement And Density
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Chem 111 UNCERTAINTY IN MEASUREMENTS PURPOSE
www.cerritos.eduExercise 1: Propagation of uncertainties (multiplication and division) A student weighed a 26.91 g block to the nearest 0.01 g and measured its volume as 25 ml to the nearest ml. What is the uncertainty in the calculated density? Density= 26.91g 0.01 g = 1.0764 g/ml 25 ml1 ml The density is 1.0764 g/ml. It should not be rounded off yet!
Power Spectral Density - MIT OpenCourseWare
ocw.mit.edu10.1 EXPECTED INSTANTANEOUS POWER AND POWER SPECTRAL DENSITY Motivated by situations in which x(t) is the voltage across (or current through) a unit resistor, we refer to x2(t) as the instantaneous power in the signal x(t). When x(t) is WSS, the expected instantaneous power is given by 1 Z ∞ E[x 2 (t)] = Rxx(0) = Sxx(jω) dω , (10.1) 2π −∞
PREPARATION OF A STANDARD SODIUM HYDROXIDE …
www.webpages.uidaho.edu1. Repeat steps 1 through 5 for the impure KHP samples, this time weighing out between 0.7 and 1.0 g for each measurement. 2. Discard the titrated solutions remaining in each of the three Erlenmeyer flasks in the appropriate waste container, and rinse the flasks first with tap water, and then with distilled or deionized (DI) water.