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List the ordered pairs that belong to the relation.
Partial differential equation PDE Utt = Uxx+sin(3px) 0
Separation of Variables. By using u(x, t) = X(x)T(t) or u(x,y, t) = X(x)Y(y)T(t), separate the following PDEs into two or three ODEs for X and T or X, Y, and T.
Show that the drag force is zero for a uniform flow past a cylinder with circulation.
Suppose: dS = a(S,t)dt + b(S,t)dX, where dX is a Wiener process. Let f be a function of S and t. Show that: df = [(?f/?S)dS + ( ?f/?t+(1/2) +b2(?2f/?S2)] dt
The random component in this random walk can be eliminated by choosing: ?=?V/?S
In solving this problem, derive the general solution of the given equation by using an appropriate change of variables-?u/?t - 2 ?u/?x = 2
Consider the solution of the heat equation for the temperature in a rod given by f(x, t) but with a variable diffusivity.
df/dt+ df/d? +df/de+1=0 Boundary conditions: f as a f(?,e,0)=0
Find the general solution of the wave equation U(tt) = U(xx) subject to the boundary conditions u(0,t) = u(1,t) = 0.
If f(x) = x, 0 < x < ½; and f(x) = ½, ½ < x <1; then what does u(x,y) from problem (1) look like?
Determine the times when the weight will pass through equilibrium.
Find the inverse Laplace transform of each of the following functions: (a) F(s) = s3/s4 + 4a4
For n > 0; find the solution to the boundary value problem -?u=(n/p)e-n(x2+y2),x2+y2<1,u(x,y)=0,x2+y2=1.
Find a partial differential equation whose characteristic curves are the lines x-y=a, x+2y=b where a,b are arbitrary real constants
Suppose the boundary conditions are that u(x,y) vanishes on the lines x=0 ,x=3, y=0, and y=2. Derive the corresponding boundary conditions for f and g.
Find solutions to the given Cauchy- Euler equation-xy'+ y =0 (b) x2y'' + xy'+y =0 ; y(1) =1, y'(1) =0
Let h=.1 use euler & improved to approximate to get "Phee" of .1, phee of.2, and phee of .3
Suppose that a rabbit is initially at point (0,100) and a fox is at (0,0). Suppose that the rabbit runs to the right at speed Vr = 5 ft/sec and the fox.
The ball is started in motion from the equilibrium position with a downward velocity of 9 feet per second.
The intake rate I1 of lead into the blood from the GI tract and the lungs is a constant or a piecewise continuous function of time.
Show that for any integer n=1, Xn(x) = e-x sin nx is an eigenfunction of the Sturm-Liouville problem for X and determine the corresponding eigenvalue.
Determine if the following system has nay non-constant solutions that are bounded, i.e. do not run off to infinity in magnitude x' = x(y - 1)
Let x: [0, infinity) -> R and y: [0, infinity) -> R be solutions to the system of differential equations: x' = - x y' = - sin y
Find the steady-state solution for the differential equation (dI/dt)+12I= 65cos(5t-30°)+ 45sin(9t +30°).