Solutions+PS+6+2009

Solutions+PS+6+2009 - 2 Take the density of air at sea...

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Prof. Cappelli Winter 2008-09 ME 70 Problems due Wednesday February 18, 2009 Energy Balances Solve Problem 4.198 (7 th Edition, Fox, McDonald, and Pritchard) Problem 4.203 ( 7 th Edition, Fox, McDonald, and Pritchard) More Bernoulli, Euler “s”, and Euler “n” Solve Problem 6.27 ( 7 th Edition, Fox, McDonald, and Pritchard) Problem 6.77 ( 7 th Edition, Fox, McDonald, and Pritchard) Problem 6.80 *********************************************************************** And an advanced look at the following problem due in two weeks (for those who want to get a head-start): Supplemental Problem Solve the rocket problem of the last problem set, with the modeled air resistance, using the ordinary differential equations solver, ode45, in Matlab. Use a drag coefficient of C D = 0.5, and a frontal area A f = 0.2 m
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Unformatted text preview: 2 . Take the density of air at sea level to be 1.21 kg/m 3 . Plot the height and speed as a function of time, to the point where the rocket has consumed all of its propellant. Compare this to the case of no air resistance. Bonus: If you are really daring – try extending the problem to model the case of a “staged” launch. That is – dump one half of the rocket’s dry mass (50 kg) after the rocket has consumed half of its propellant. What velocity do you reach at the point of propellant consumption? We will work on the Matlab background material to do this problem, in the recitations. Prof. Cappelli Winter 2008-09 Prof. Cappelli Winter 2008-09 Prof. Cappelli Winter 2008-09 Prof. Cappelli Winter 2008-09 Prof. Cappelli Winter 2008-09...
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Solutions+PS+6+2009 - 2 Take the density of air at sea...

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