Αποτελέσματα Αναζήτησης
understanding of the nature of measurement and uncertainty. In addition, the coherence of the approach will foreground the central role of experiment in physics and the interplay between scientific inferences based on data and theory. AB, MSA, FEL, RMC November 2002 Please inform the authors before using these materials in any teaching situation.
The process of evaluating this uncertainty associated with a measurement result is often called uncertainty analysis or error analysis. The complete statement of a measured value should include an estimate of the level of confidence associated with the value.
Measurement and Uncertainty • Physics is a quantitative, experimental science. To do physics, one has to make measurements. • Every measurement has an uncertainty; no measuring 3 instrument is perfect. • Uncertainty may be written explicitly, e.g., height of a table = 72.3±0.1 cm
the accurate measurement may lead to improved complex systems e.g., space shuttles, while in medical metrology accurate measurement of blood pressure lessens the risk of misdiagnosis and disease.
Measurement and Error Analysis. A.1 Measurement, True Values, and Errors1. In a typical experiment, we are usually interested in determining the value of one or more physical quantities: the width of a block of glass, the period of a pendulum, the mass of a body, and so on.
Measurement = measured value ± uncertainty (unit of measurement) For example, with a vertical meterstick (with 1 mm as the least count), you might measure the height of a chair as 41.2 cm. You should report the value as 41.2 ± 0.1 cm. There are some exceptions: USING STANDARD MASSES (mass)
Experiment 1: Measurement and Precision Report: In addition to the standard elements of a well written lab report described in the introduction to this manual, your report must include: 1) An appropriate title 2) The objective of the experiment 3) Your group’s data in an appropriate format 4) A graph of your group’s data
