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Lab1- thupakip - CE321 Lab 1 Fluid Statics I xc yR = yc yc...

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1 CE321 Lab 1 – Fluid Statics Objectives Determine the accuracy of Eq.1 Determine whether the measurement uncertainty accounts for inaccuracies Comment on suitability of Eq.1 for engineering use c c xc R y A y I y + = …(1)
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2 {M C.W +M BEAM +M Q +M WT } +M W +M F = 0 After Calibration: M C.W +M BEAM +M Q +M WT =0 W*L 1 -F* L 2 =0; L 2 =L 3 -d+ Y R
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3 Case I Quadrant face is partially submerged – Y R =(2/3) H Case II Quadrant face is fully submerged – (2/3)H<Y R <(1/2)H NOTE: H = Height below water level
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4 Inaccuracy – difference between expected and measured value Precision – how closely the measured values are ‘bunched’ together; result of multiple experiments Uncertainty – domain around measured value where actual value might lie Error Absolute – dQ Relative – dQ/Q Propagated – caused when Q is a function of measured values, each with an uncertainty of its own NOTE - Q is any measurable quantity
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5 POST LAB SESSION ANALYSIS
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