2nd degree Definition and 16 Threads

Concerning Global warming; Can we cool atmosphere by converting it's heat content to electricity? if we do so is it became a perpetual machine in 2nd degree or not? I'm not so good in thermodynamics. But I'm sure it will not violate 1. rule energy is not created from noting, energy converted...

Homework Statement [/B] Solve without external aids. You may use memorized 2nd degree equation formula. 9(x-2)= 3x(x-2) Homework Equations 3. The Attempt at a Solution [/B] Use memorized 2nd degree equation formula 9x-18= 3x^2 -6x ]]] + 18 9x= 3x^2 -6x +18 ]]] -9x 0 = 3x2-15x + 18...

Homework Statement Y''-((Y')^2)+(C1*exp(Y))=C2 C1 and C2 are constants. exp = e Homework Equations No clue how to start this The Attempt at a Solution Y'=A=dY/dt Y=At+C3 (not sure) A'-(A^2)+C1exp(At+C3)-C2=0 A'-(A^2)+C1exp(C3)exp(At)=0 let C=C1*exp(C3) A'-(A^2)+Cexp(At)=0

My BS is in Physics and I had considered getting another BS in industrial engineering. However I have question that I can not find any direct answer on FAFSA website I have accumulated more than 180 hours in my Bachelors Degree, going over the 150% limit for an undergraduate major. My appeal...

Thank god I found this website! Bear with me, its a bit of a long explanation before the question.. So let me start by saying that I'm a finance major, senior year, excellent GPA, but tremendously unmotivated for prospective business/finance industry. I love sciences, I love maths and I've...

I graduated with degrees in both mechanical engineering and physics the past spring. I'm sort of feeling however that I wasted my time doing this. And by that I mean that a BS in physics does nothing in terms of finding jobs (unlike a BS in engineering). And also not going for a PhD in physics...

My background: -BA Economics 2007 from a UC school -I took a year of Calculus, Linear Algebra, Differential Equations, and a few Stats courses as well to prepare for grad school in Econ. -I never took General Chem or Physics -Worked in finance. I realized early on that my job was more about...

Hi everyone, I am new to the forum, so please let me know if I have made any mistakes in my posting location. As mentioned in the title, I am returning to school for a second undergrad degree. My first degree was in Business Administration - which did not satisfy my academic needs (to say the...

Let's say i have a parametric equation: x = t^2 y = t^3 + 4t Even though this is a 2nd and 3rd degree parametric equation, i can isolate and express in terms of y = f(x) because the parametric equation for x involves only one term for t. Thus: t = sqrt(x) and y = sqrt(x)^3 + 4(sqrt(x))...

Hi. I recently started studying differential equations, so bear with me. I started out with the following equation: y'' - 10y' -61y = xe^{-x} I know the method for solving these, but the thing I don't understand perhaps isn't the differential eq. part, rather the simplification of the...

Hi friends, I have been trying to solve the ode of second degree below with respect to z: d2y/dz2=(i/a*z+b)*y i is the complex i, a and b are constants i ended up with the summation of bessel functions of first end second kind. Then I checked with MATLAB ode solver it gives no...

Distribution of difference of two second degree non central chi squared random variables. This problem can be cast as an indefinite quadratic form for which there are a number of general numerical techniques to determine the CDF. Alternatively, it may be written as a linear combination of...

Homework Statement Given 2y^3 +(6x^2)y-12x^2+6y = 1 A. Show that dy/dx = 4x -2xy/x^2 + y^2 + 1 B. Write an equation of each horizontal tangent line to the curve C. The line through the origin with slope -1 is tangent to the curve at point P. Find the x-y coordinates of point P. The...

I just came across the eq. z^2 - 2z + 1 - 2i where z is a complex number. How do I solve this sort of eq.? I tried to solve it as a normal 2nd degree eq., setting a=2, b=-2 and c=(1-2i), with z as the variable. This finally gave me the solutions z(1) = -1 + sqrt(2i) and...

How do you algebraicly find the solution to this equation 6sin(to power of 2)x-6sinx+1=0 where 0<(or equal to) x <(or equal to) 2pi

Hi, I would to check if my transformation from an ODE 2nd degree to ODE 1st degree is fine: X''(t)+X(t)=0 I set: X1(t)=X(t) X2(t)=X'(t) this implies that: X1'(t)=X2(t) so the original equation becomes: X2'(t)=-X1(t) PLease tell me if I am right? B