Recent content by dmoney123

I don't actually know what you mean by your last paragraph. How would you would the small bleed tube operate as a level sensor? Can you please explain how something like that might work?

Thanks for the advice. Your feedback was exactly what I was looking for.

I am trying to design a water vessel system that maintains it's water level as it is consumed. In item 1. It's a simple water barometer, where the height of water in the column can be supported by atmospheric pressure until 10.34. In item 2. There are two columns that are open to atmosphere...

Figured it out. (4 pi r^2)=P/I where r=46. P=4.2*10^-4

Homework Statement An enclosed chamber with sound absorbing walls has a 2.0 m × 1.0 m opening for an outside window. A loudspeaker is located outdoors, 46 m away and facing the window. The intensity level of the sound entering the window space from the loudspeaker is 42 dB. Assume the acoustic...

i think i got it. thank you very much zondrina!

Thank you! So you would run the central difference formula with 2, 1, 0.5. then for we would use f(2) and f(1) , and then again with f(1), f(0.5)? Maybe what confuses me is when they say "calculate the TRE of the last estimate", its just the second of two estimates calculated using Is it...

Homework Statement [/B] use richardson extrapolation to estimate the first derivative y=ln(x), x=5 using steps of 2, 1, 0.5. Four decimal points. obtain true relative error for the last estimate and comment on its value. Homework Equations [/B] deriv ln(x)=1/xThe Attempt at a Solution I know...

Thank you so much! That makes total sense!

Okay, I work this out to y_1=1/4 and y_2=1/2... which seems to fit in the equation... but I am still not really sure why the coefficients for the e^(-4t) don't seem to match the solution

I have not encountered this type of problem before. How do you go about finding the particular solution?

Homework Statement Consider the initial value problem for the system of first-order differential equations y_1' = -2y_2+1, y_1(0)=2 y_2' = -8y_1+2, y_2(0)=-1 If the matrix [ 0 -2 -8 0 ] has eigenvalues and eigenvectors L_1= -4 V_1= [ 1...

right... 3 roots... so r^3-r=0 r=0, r=1, and... r=-1 -1-(-1)=0 I always get stuck on the stupidest mistakes. I really appreciate it! thanks

Homework Statement If the method of undetermined coefficients is used to find a particular solution yp (t) to the differential equation y'''-y'=te^(-t)+2cos(t) should have the form: ?Homework EquationsThe Attempt at a Solution LHS r^3-r=0 roots= 0, 1 y_c(t)=c_1e^tRHS te^(-t)+2cos(t)...

Got it... I was making a mistake with my derivative... I feel stupid. Thanks Mark44!