Mathcad

Does anyone remember the list of mathematical constants that were posted on the Mathcad website? Can anyone please tell me how I can locate that list? There were some pretty interesting constants like how many cars could park on the side of the street, and so on.

Hi,I have entered a sample problem 8.14 from"Mathcad for Chemical Engineers" Adidharma and Temyanko.The PDE is shown in red.I have tried to research the problem but have not had any luck. Is the the PDE outside of of the solver block and this is what is causing an error. Please advise.

Surface plots, even in the tutorial, are not showing up (just a white square). If I change them to contour plots, they are ok. Has anyone else had this problem? Or a suggestion? I am using MC 14 M020 and Windows 7. I am sure that I did not have this problem on my old computer (which was running XP), but maybe I have inadvertently changed some setting?

Greetings. Refering to the attached, I have two solve blocks. The second (right side) is the same as the first (left side), except I've unsuccessfully attempted to parameterize the result such that I may vary the two constants (dy and L). MathCAD seems to have thrown up on this for some reason. Any help would be appreciated.

Flight simulator in Mathcad 14 (video of maneuver №2) by Guilherme Nunes. Mathcad worksheets can be found here: http://communities.ptc.com/docs/DOC-5476   (view in My Videos)

Flight simulator in Mathcad 14 (video of maneuver) by Guilherme Nunes. Mathcad worksheets can be found here: http://communities.ptc.com/docs/DOC-5476     (view in My Videos)

Hi I get an error message when opening files with images. This can be images I added when I first created the file, or images that one of my coworker added/replaced the initial images in a later revision of the file. My coworker is having no problems opening the file, but when I go to open the file I get the following message and a gear with a red line across it. The message was: Some regions are corrupted and cannot be opened. Log file is located at C:\ProgramData\PTC\Mathcad Prime\Logs\Mathcad Prime_Exception_20140520_103637.logIT support has looked and compared the JPG default programs, than suggested uninstalling and re-installing MathCad. I have done this and it still is having the same error message (new log file each time I believe). Thanks

I have been trying to set up a constrained minimization problem parametrically, so it behaves rather like a function. From reading previous discussions, I understand that solve blocks cannot be placed in programs. However, the Quicksheet on Constrained Nonlinear Optimization shows that it's possible to parameterize some parts of an optimization, specifically, (1) the guess values, and (2) additional parameters of the objective function that are not involved in the optimization. I've attached the Quicksheet with those two items highlighted. BUT... is it possible to parameterize the constraints? For example, the values 2 and 9 in the Quicksheet's constraints. Ideally, one would write a program containing the solve block, but that's not supported. Any workaround? Thanks in advance to any of you who can shed light on this. And thanks to Valery Ochkov for explaining where to post questions or discussions.

Hi there.I'm trying to find the time, where the my function reaches its maximum value. But due to a local minimum in the beginning, mathcad is only giving me this value.How can I get mathcad to give me the other value as well? I've tried defining t to be after the minimum, but it just gives me a lot of the same, first, value.I really hope somebody in here, is a bit smarter than I! 🙂Have a great day,Ben

Amoeba crawling into a narrow ravine     Unable to play video. Please try again later.(view in My Videos)

Problem "A Name has required here" Help me please..I can`t find there's a error((

Hello folks,I'm trying to solve the Bessel equation that arises from the heat transfer equation of a straight triangulat fin. I know the analytical solution, but need to calculate the numerical solution for comparison purposes.At the tip of the fin we know that dT/dx=0 and that at the base T(x)=Tb. I've tried using odesolve but it cannot solve the equation, so I'm thinking that odesolve is not the right solver, but do not know which one I should use. In this case, I placed the origin at the tip of the fin to simplify the differential equation.Please take a look at the attached file for additional detailsAny suggestions or recommendations would be greatly appreciated.Thanks!

I have been trying to set up a constrained minimization problem parametrically, so it behaves rather like a function. From reading previous discussions, I understand that solve blocks cannot be placed in programs. However, the Quicksheet on Constrained Nonlinear Optimization shows that it's possible to parameterize some parts of an optimization, specifically, (1) the guess values, and (2) additional parameters of the objective function that are not involved in the optimization. I've attached the Quicksheet with those two items highlighted.BUT... is it possible to parameterize the constraints? For example, the values 2 and 9 in the Quicksheet's constraints. Ideally, one would write a program containing the solve block, but that's not supported. Any workaround?Thanks in advance to any of you who can shed light on this.

The animation is here and in attach (with Mathcad 15 file).About this method - http://en.wikipedia.org/wiki/Nelder%E2%80%93Mead_method

Hello,I'm trying to solve an ode in Mathcad Prime 3.0 using odesolve. I know the analytical solution (which I used to calculate the "initial" condition since the actual problem has a Neumann BC @ x=0 and I believe that for second order ode's we cannot use a Neumann bc as the "initial" condition).The problem I'm having is that Mathcad says that the units are not compatible. However, I have triple checked the units and they are correct.Please take a look at the worksheet attached and let me know your thoughts/comments/suggestions.Thanks!

Simplex method of nonlinear optimization - 2 One real amoeba!     Unable to play video. Please try again later.(view in My Videos)

The Nelder– Mead method or downhill simplex method or amoeba method is a commonly used nonlinear optimization technique See please http://en.wikipedia.org/wiki/Nelder%E2%80%93Mead_method   Unable to play video. Please try again later.(view in My Videos)

I am solving two equations in two unknowns. One is linear so I can just solve it, substitute into the other (nonlinear) equation, and use the root function to get the result. This works fine as illustrated in the attached worksheet. But when I try to use a solve block to find both unknowns, I get an error. I am sure I am doing something stupid but I cannot see what it is.

Hi,I am working on a inductor/transformer design. I did a sheet with one calculation I am happy with. I did a copy of it, and pasted it just below. I would have assumed all variables would be reaffected, and it would all work well.Except it didn't. With the exact same input, copied below, one of the result is wrong (and quite obviously, since the unit is all messed up).Se attached document : in the first calculation, Bmax = 0.402T ; in the second, Bmax = 0.013 m T / A. Again, it is just a "brutal" copy and paste ...Thanks

Can anyone help with this worksheet please. I've setup 3 simultaneous equations but am struggling to solve them.How to draw the points in 3D and the plane also??ThanksJason

I am new to mathcad and i dont know how use mathcad so can u tell how i can see the derivatives of af function r(t): e^t+(2/9)'e^2*t , t = ln 3 idont understand all the differential equation feature with adams, BDF , Jacob and so on pls help

Hi. How do I write and describe this summation: in Mathad Prime 3.0? P.S. Dont mind the second X in brackets, I can't find a way to describe Xi.

I'm getting a "this variable is undefined". I don't know why...It's Mathcad 15..probably something simple I'm overlooking, but I don't see it!Hope someone can point it out, and I will happily say "D'Oh!"

I am evaluating Mathcad Prime 3.0 to upgrade our Mathcad 15, and I am noticing a difference in the math inputs.I tried to define the math below and after entering number 6, I press the spacebar TWO times to get the entire line underlined with the blue line. Once all the numbers are underlined, I can just press "Shift" + "F" and the letter F gets appended to the end.This behavior is different in Mathcad Prime 3.0. After entering the number 6, I press the space bar THREE times to get the entire item selected. However, when pressing "Shift" + "F" to insert the unit Farad (F), the entire item is DELETED instead. The old behavior was more intuitive because I have learned from Mathcad that any item under the blue line gets concatentated to the next operation. In fact, I must prefer the blue line more than the gray highlight. The blue line is easier to see.The only way to insert the "F" is to press the right arrow on the keyboard to the right so that F can be inserted. Again, the old method w

I am using a 30-day trial of Mathcad Prime 3.0 to compare with Mathcad 15. Right away, I am having issues with displaying units on the calculated results.Mathcad 15 is shown below where I inserted in the "nJ" so that I see the more convenient units.Here, the same math is written in Mathcad Prime 3.0, but I get an error when I tried to type in nJ. I have tried many methods, but I can't get it to show nJ for some reasons. How do I get it to show nJ instead? I use this feature heavily, so being unable to show nJ (or any other units of choice) is a showstopper.