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Old 08-23-2012, 12:06 AM   #41
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I'll never forget looking up at a contrail drifting in the sky and seeing the math in action. It's a beautiful thing.
What math in particular are you referring to? When I see one it just looks like a temperature differential in a field with a constant dew point spread. Is there some higher meaning?

As much as I enjoyed feeling smart taking the math classes, it's not something my brain is wired for... The more visual the better.
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Old 08-23-2012, 12:13 AM   #42
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Diff eq's is a biattttch while youre taking it. Too much too learn to quick. Then one day about a year later I was in a control systems design class and everything I had been tought (and almost failed) had sank in and it became very clear. I think thats how most engineer I went to school see it.
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Old 08-23-2012, 12:37 AM   #43
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only reason i passed was bc everyone else was failing and the prof curved, got a B with 40%
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Old 08-23-2012, 12:55 AM   #44
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Def know partial fraction decomposition, that comes up over and over again. Only thing from calc 2 i saw repeatedly was integration by parts. The rest was pretty straight forward stuff. The laplace isn't that bad either. I felt everything looked like y" + y' = e^2t lol
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Old 08-23-2012, 12:57 AM   #45
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For what its worth, i took the class second half of summer and pulled an A-. I did study literally everyday. Dont skip out on any parts in diffEQ, literally everything builds ontop of each other and near the end you'll be using everything you learned to solve an equation.

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Old 08-23-2012, 08:43 AM   #46
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What math in particular are you referring to? When I see one it just looks like a temperature differential in a field with a constant dew point spread. Is there some higher meaning?

As much as I enjoyed feeling smart taking the math classes, it's not something my brain is wired for... The more visual the better.
I was taking fluid mechanics at the time and the whole class up to that point finally clicked. It's calculus and very basic diff eq. What's even cooler is knowing the thermodynamic processes that drive the weather and having an intuitive idea of how the flows will move. I can honestly say that point in time is when my hatred ( lack of appreciation/understanding) of math died.
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Old 08-23-2012, 09:26 AM   #47
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I was taking fluid mechanics at the time and the whole class up to that point finally clicked. It's calculus and very basic diff eq. What's even cooler is knowing the thermodynamic processes that drive the weather and having an intuitive idea of how the flows will move. I can honestly say that point in time is when my hatred ( lack of appreciation/understanding) of math died.
This is a curse that plagues all engineers. When I first started taking my control systems class, I got into my car and wondered what feedback loop my cruise control used.

That said, fluid mechanics and thermodynamics explain so much of our real world and even day to day dealings with our environment. Gives me so much more of an understanding of how the world works.
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Old 08-23-2012, 12:31 PM   #48
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Try taking Electromagnetics.

Wireless anything blows your mind.

I got moist thinking about weather radar.
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Old 08-23-2012, 12:49 PM   #49
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Try taking Electromagnetics.

Wireless anything blows your mind.

I got moist thinking about weather radar.
I had one EM class ...5? years ago but I couldn't be bothered to care back then. It was 9am and I was hung over a lot of the time. I'll have a full year of it starting in the spring, looking forward to it now.
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Old 09-04-2012, 07:40 PM   #50
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Anyone want to take a stab? I'm 95% there, but can't quite get it.

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Let S(t) represent the amount of a chemical reactant present at time t, where t>= 0. Assume that S(t) can be determined by solving the initial value problem


where a, K, and S[sub]0[/sub] are positive constants. Obtain an implicit solution of the initial value problem. (The differential equation, often referred to as the Michaelis-Menten equation, arises in the study of biochemical reactions.)
My answer, minus some constant C. When I solve for C, I get the whole mess =0, which isn't right.

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Old 09-04-2012, 08:04 PM   #51
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I'm baked right now let me try this in the AM.

Is the comma after S in the denominator a sentence pause, or some kind of prime notation?

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Old 09-04-2012, 08:07 PM   #52
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I'm baked right now let me try this in the AM.

Is the comma after S in the denominator a sentence pause, or some kind of prime notation?
I'm gonna quote this so you can read it later.
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Old 09-04-2012, 08:09 PM   #53
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that's an apostrophe isn't it.

What's it signifying?
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Old 09-04-2012, 08:16 PM   #54
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You had it right, Prime notation.
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Old 09-04-2012, 08:18 PM   #55
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That's basic calc stuff
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Old 09-04-2012, 08:18 PM   #56
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If you did fine in calc then you will be fine in differential equations, it's one of the over hyped classes IMO in terms of difficulty. The first couple classes in it are easier than most other. Linear algebra is pretty easy once you get the hang of it, it's the same damn thing over and over again. Linear and Nonlinear optimization gets tricky depending on the professor.

Not sure how much of a stickler your professor is but I remember in differential equations we had to hand write every step (ie, no calculators to solve the integration and whatnot). So I would maybe practice that if you aren't comfortable with it.
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Old 09-04-2012, 08:19 PM   #57
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That's basic calc stuff
Perhaps we don't realize just how high he was.
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Old 09-04-2012, 08:20 PM   #58
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S........................................................... .....................................equals -aS/K+s
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Old 09-04-2012, 08:23 PM   #59
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I absolutely hated diff-eq.

Applying it to thermo, heat transfer, controls...etc. It's a breeze.
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Old 09-04-2012, 08:23 PM   #60
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Perhaps we don't realize just how high he was.
What are you up to Thursday? Probably going to head up to the city for lunch. lol
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