are there practicle examples  of  plancs  constant?
141802
Planck's Constant is a central feature of quantum mechanics, and the study of quantum mechanics has led to such practical applications as laser technology,transistor technology,the electron microscope, magnetic resonance imaging (diagnostic medicine), and countless applications in chemistry research.
130040
http://en.wikipedia.org/wiki/E_%28mathematical_constant%29\nfor the significance of e and how it is used, use this link
362083
Please use the search function. This question was asked 5 days ago:\n\nA proper polar coordinate system (one that assigns each point in the plane a unique coordinate) will always leave out a ray of points. For example, the standard polar system that identifies the open set (0, oo) X (0, 2Pi) with R^2 - {0} by the function f(r, t) = (rcos(t), rsin(t)) ( = (x, y) ) does not correspond to any points on the positive x-axis and necessarily leaves out the origin (there is no way to include the origin uniquely). This is usually glossed over in a basic calculus or physics course as one actually uses an atlas of polar coordinate charts (this atlas never includes the origin, but at least covers the plane minus the origin); you use whichever chart is convenient for the problem at hand. Some definitions will disregard the need for a homeomorphism and include the positive x-axis by considering a domain that is not open, (0, oo)X[0, 2Pi)
847176
f(x,y) = x^2*y*(e^(-x^2-y^2))\n\nfx(x,y) = 2x*y*e^(-x^2 - y^2)(1-2x^2) this is wrong:\nf_x(x,y) = x^2y ( e^(-x^2-y^2)) (-2x) + 2xye^(-x^2-y^2))\n= 2xye^(-x^2-y^2) [-x^2 + 1] =0\nif x=0 or y=0 or x^2 =1, \nx=0, y=0, x=1 or x=-1\n\nfy(x,y) = x^2*e^(-x^2 - y^2)(1-2y^2) \nf_y(x,y)=  x^2 y (e^(-x^2-y^2)) (-2y) +  x^2(e^(-x^2-y^2))\n=x^2e^(-x^2-y^2) [-2y^2 + 1] \nx=0, y=1/sqrt(2),y=-1/sqrt(2)\n\nso the critical points are: (0,y)\n(0,0), \n(1,1/sqrt(2)), (1,-1/sqrt(2))\n(-1,1/sqrt(2)),(-1,-1/sqrt(2))\ns
868371
can you give examples (such as the witches equation)
956604
Try it out in the lewis-dot diagram\n      ..        ..\nH-O-Ca-O-H\n      ..        ..
1066144
Without the knowledge of where point e is, this problem is insolvable.\n\nI suspect, however, from a brief diagramming session, that you will need to solve for the length of ab using the Pythagorean Theorem, and set up similar triangles.
732831
As for me I think all is persuasive. If you start to count temperature from the point when its length = 50cm you better write: L=50*e^(kt) cm. \nNow (iii): the constant k is valid to be unchangeable in rather narrow range of temperatures, in real physics k depends on t. And after melting the whole business does not work at all. On the other hand the function L=50*e^(kt) says that if t<<0 L is expected to shrink to 0, ignoring the fact that t cant be lower than absolute 0.
1102103
These are best known as "Euclid's Postulates":\n1. Any two points can be joined by a straight line.\n2. Any straight line segment can be extended indefinitely in a straight line.\n3. Given any straight line segment, a circle can be drawn having the segment as radius and one endpoint as center.\n4. All right angles are congruent.\n5. Parallel postulate. If two lines intersect a third in such a way that the sum of the inner angles on one side is less than two right angles, then the two lines inevitably must intersect each other on that side if extended far enough.
529435
I would expect it to be square planar. What's interesting is that the trans effect was discovered on experiments involving platinum complexes, in the 1950s.
413103
err.. if you are talking time constants (tau) the time constant is inversly proportional to flux density.\n\nThis is if you are talking about capacitance or inductance. A bit hard to tell what you are asking here
267038
You might try reading Whitehead and Russell's Principia Mathematica.  I can't promise it will help, as I haven't read it, but I've been told that this issue is addressed.
670024
plano concave\nconvexo concave\nconvergent
1077320
My TI-83plus can do that...but it has to be an invertible matrix.  If the determinate is zero, then it can not be done
737727
What does C represent?  If C is a constant, then this doesn't converge.\nWhat is the context?  What is the name of the class, chapter and section that this comes from?
1053820
Stationary in reference to what fixed point?
583382
Try the moebius spiral. It's pretty interesting because it's non orientable. \n\nIt's 3d (2 parameters s and t) and described by the parametrized vector components:\n\n[3*cos(s)+t*sin(s/2),\n3*sin(s),\nt*cos(s/2)]\n\n(every component of the vector in a new line)\n\nThe parameter ranges are:\n\ns=-2*Pi...2*Pi,t=-1..1\n\nMAPLE INSTRUCTIONS TO PLOT IT:\n\nwith(plots);\nplot3d([3*cos(s)+t*sin(s/2),3*sin(s),t*cos(s/2)],s=-2*Pi...2*Pi,t=-1..1);\n\nSorry, that instruction is big and not displayed well, but I guess since you know the parametrized vector you can find it.\n\nWHAT DO YOU WANT IT FOR? WANT TO PUBLISH ANYTHING?