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Engineering, 30.11.2019 01:31, Wolfgirl2032
The error function, erf (x )equals startfraction 2 over startroot pi endroot endfraction integral from 0 to x e superscript negative t squared baseline dt , important in probability and in the theories of heat flow and signal transmission, must be evaluated numerically because there is no elementary expression for the antiderivative of e superscript negative t squared. a. use simpson's rule with n equals 8 to estimate erf (3 ). b. in [0 comma 3 ], startabsolutevalue startfraction d superscript 4 over dt superscript 4 endfraction (e superscript negative t squared )endabsolutevalue less than or equals 12 . give an upper bound for the magnitude of the error of the estimate in part (a). a. the simpson's rule approximation for erf (3 )is
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Engineering, 04.07.2019 18:10, niyawilliams23
Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10
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Engineering, 04.07.2019 18:10, siri5645
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
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