Mathcad

This system has not solution. The lsolve must return an error message, not solution! What do you think about this?

The committee to collect data in the field of science and technology (www.CODATA.org) produces every four years a list with redefined values of several physical constants. In the 2010 list, for example, you can find redefined values of constants, including the uncertainty parameters. So you can find the value of the fine structure constant, which is used in atomic physics, with reduced uncertainty. Furthermore, there is the specified Planck constant, which relates the energy of electromagnetic radiation to its frequency. These changes also affected the Avogadro number, showing the number of particles in one mole of a substance, and the Boltzmann constant, the binding energy and temperature. Redefined values of the constants, especially of the Avogadro constant and the Boltzmann constant were seen by physicists as a signal to update the international system of units (SI), which will be discussed in 2014. This will primarily affect the five units - amperes, moles, kilogram, kelvin and pa

I was reading a science fiction ebook and an exchange along the lines of,   "I'm afraid we may have a mole or two in our midst." "You mean spies?"   caught my eye.  And, I couldn't help it, I thought "A mole of spies ... that sounds like an awful lot of spies. Surely somebody would have noticed before then?".  That's the danger of having, a few minutes previously, read a post by @ValeryOchkov on units and Avogadro's number[1].     So, by the titular abuse of notation, ...     There you have it.  The world population is about 13 femtomoles and, in case you were wondering, the total number of humans estimated to have existed is 166 femtomoles.  And as if I didn't feel insignificant enough before, I certainly do after noting that I'm only 1.6 yoctomoles - thank you very much Mathcad Prime Express 7.    ... maybe I've made a typo somewhere and it should be an ego-boosting megamole?   By a great effort of will

Quora shows interesting math. Prime 7 can show third equation is also pi. I want to calculate until and   does not show pi/2      need very long time to solve.

HiI get positive and negative result for my answer  which is understandable but I only want the positive result to display.

Hello. I am looking for some assistance with for loops and matrices within Mathcad. I have a relatively basic knowledge of mathcad so this may be a straightforward solution.   I am trying to return a value for m11 for each of the sigma(11) values. However, the way i have it set up, it only returns the m11 value when i = 2.  I know i could list the equation out 3 times, changing the "i" with 0, 1, and 2 each time; however i had thought i may be able to do the same thing using the for loop function. Thank you.  

I am trying to solve an equation like:   this one can't be solved analytically and a priori the solve block does not work correctly (in the way I use it. see attached file Any idea how to solve this equation

Hello!   I am trying to sum up all the values of the given function f(x) by using the summation operator.  Variable "x" has assigned values in vector form. How do I proceed here?   Please, take a look at the attached file (Mathcad Prime 6).   Best regards, Sergey 

Why is there a minus sign and not a plus sign.I heard that this is some kind of military secret of the British - the enemy did not know the true height of the soldiers!  And more: F - feet, I - inch, F - ? Fraction?      

To all,   I am playing around the 'Singular Value Decomposition' in mcad 15 (function sdv2). Follow the example and all good . Get S, U and V matrices What is the correct syntax to use the data to solve {y}=[A]{f}? see attached I know it’s a dumb question but the obvious syntax f = svd2(H)y does not work !   Thanks

I would like to hide the variable name and only show the result of an equation.  I've seen several ways to do this in MathCAD 15, but we've switched over to Prime.  Is there a way to do this in prime?     For my specific application I'd like to show the result of a previously evaluated equation in line with some text so that my wording incorporates the result of my math.  

HI   Iteration help, please. Mathcad Prime 7 attached.

Hello, I am trying to do a finite difference to solve the differential equation and compare it with the analytical solution. I am not sure why I am not getting the plots to work out. I attached both Mathcad-15 and Prime 7 files. I converted 15 to Prime7.   Thank you, Sam

Hi, we are working on a project and we can not figure out why our solve block is having errors. We are looking to optimize the flow rate, but we need to find all the friction factors and Reynolds numbers, and pressure changes in each pipe. We are using the Chen equation, which includes flow rate and Reynolds number. Please help! Also, any other tips would be greatly appreciated!!

Hello! I am trying to write this formula: It uses the previous result (i-1) to calculate the next result (i).  How should it be written in mathcad? Right now I get an overflow or infinite recursion error.  

Hello All,   I was wondering if any of you had a chance today if you could take a look at this Mathcad file. I have highlighted the area where my given/find code breaks and I am not sure what is the issue.    Thank you very much. 

I'm getting an error on requesting free license when installing Mathcad 15, after just installing Mathcad Prime.   I'm using windows 10.  When acquiring the license in the last step a box pops up-Unexpected error The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF.

Hello,  Per this post here -  urgent help needed! Can someone help convert attached XMCD file to MCDX?  Many thanks! Lei

Hi all,   I'm currently trying to run a quick check on my Mathcad worksheet that populates a "Yes" or "No" to validate whether the section modulus value is above the required one.  When I place the yes and no variables in the program it says they're undefined.  I switched them to the "keyword" label in hopes that would remedy my situation, but unfortunately I have the same issue.  Attached is a snippet of what I currently have in the worksheet.  Please let me know your thoughts.  Thanks!

Hello,   I'm quite new to MathCAD and I'm having problems with a unit somewhere in this BCGA pressure drop calculation. The error is "This value has units: Length^2 . Time^-2, but must have units: Pressure^2.   There is one input in the formula that is unitless (Specific Gravity), I wondered if this was causing the issue.   Any help would be appreciated! Thanks

Hi everyone, I am working on a force analysis for a kinematic mechanism. I have been able to resolve most of the errors that I'm seeing, except for a few. I have two declaring that the value must be a vector, and I'm not entirely sure how to correct this. I also have two errors saying my array index is invalid when I'm simply trying to label my variables. Any help here is greatly appreciated. The file is attached.

Having a problem getting the following to work, I think it's really just logic, as trying to use to determine which one equation from 4 should be being used!   

Hi all I am trying to include Mathcad files where I use a variable as a part of the file name. i.e. when I change the variable, the name of the included file changes. I want this for Mathcad 15 and Mathcad prime. Thanks

I downloaded and installed Prime 7.0 and the new converter that is supposed to convert MC15 worksheets to Prime 7.0 worksheets.  The first two MC15 worksheets I converted were claimed to have been converted, but did not work properly in Prime 7.   The more complicated one had a plot which uses a format that may not be supported in Prime 7, but the second file is a mystery. It is an extremely basic worksheet, so basic that it could be argued that I'm wasting the power of MC, but the file does use units. After conversion, the Prime 7 worksheet would not work until I removed and replaced at least some of the units and the PI symbol.   It seems as if the converter is unable to properly recognize and convert unit symbols and PI. If so, this is a massive fail.   Three files are attached. The MC15 file, the Prime 7 file as converted, and the converted Prime 7 file as fixed.   If I am making some stupid mistake, please let me know.

My print to PDF does not fully print Pages on the right side. Chops off most of the right-hand side of the sheet. This is what the PDF looks like.   Eg: The visible part when I try to print is: This is what the Prime 7screen looks like.       Any particular settings I have to enable? Thanks