Mathcad

Does anyone have a copy of the pipe netowrk example  pipe_flow.mcdx   that they could share?   I have seen it referenced multiple times in various mathcad communities but have not found a download link.   It may have been related to a Hodge and Taylor white Paper.   Thanks Tim    

What I would ideally like is to have a variable or function set to a derivative operator, so Variable1*variable2 = derivative of variable2 with respect to some constant.   I would like this as I am dealing with equations of numerous constants and some derivatives go to 0. "Do this operator on every operand possible in this following equation" just makes it easier than figuring out which ones I need to do by hand.

What connects this three cities?

This is a thermal design project where we need to find the flow rates through multiple pipes. There are 25 flow rates I am looking for.   I'm not sure where the problem is. I have tried entering the variables in comma form (Q1, Q2, ...) and that produced an error as well.   I'm not very savvy with MathCAD so a descriptive answer would be appreciated.

Hello there, I have a function that I'm trying to calculate using various methods (in Mathcad). f(x) = 1/(1+x)^2 I've attached a photo of my code. The problem is, that for every x from -0.9 to 0.9 the calculations are great, but if i choose x>1 - it gets stuck on an infinite loop (sometimes it even says that it encountered a floating point error). If i try to do a graph of s[0] it also only shows results till x=0.99.  What am I doing wrong? Thanks in advance.

I'm currently trying to write a while loop that will loop and add 1 cm to (D.section1) until the loop is able to reduce the total Incident Energy to under 1.1 but currently I'm getting a statement saying "This function refers to itself inconsistently"

I want to find first five roots of this equation using mathcad . I could'nt able to find any helpful info on the web, so i am posting it here   0.1*x+10*tan(0.1*x)=0

  Hello, When I use the include function I get a window, where I can point to a path/file. Then I get a big green exclamation mark. Is this function supposed to do something? I did hit F1 but that did not have much info there. I thought the entire worksheet would show up.    PS. It has a red border, because I altered the path, to comply with our company's procedures.

Good morning to all, currently i'm dealing with the theory of numbers where i have to find the solutions of a linear diophantic equation in common. Is there any way in MP4 to call up a function for this problem, does there exist an implemented function in Prime for this? Thanks in Advance Volker

Hell to all,   I am working on a bigger Ship Propulsion problem.    I have got to one of those scenarios where it feels like I am missing an input in order to get the ultimate solution.    Can anyone tell me if it is possible (by substitution) or otherwise (in the attached capture) to get values for either Rt or T if I have values for Vs, Va, w and t?   using MC's Symbolics it suggests not but it must be possible?   Thanks,   Andy.

I want to replace function (F) with a more compact expression (F2). However, an error occurs.  

When i change the value of E in solve block it changes the value of both E and n , but when i change the value of n , nothing happens. Here n and E are two variables i need to find. Other values on left hand side need to be fixed. If you know any other method to solve, please let me know

Hi everyone, I've seen that this question has been asked before but not to Mathcad Prime 4.0. I've tried using the caracter map, insert the plus minus sign into a function but it does not recognize it as a function but a variable that you have to define. Some recommend to write some type of command so you can define the plus or minus character. Ok lets say that I obtain Plus and minus character from charactermap. What type of a function or equation should I define it on as to it gives me a asort of "multiplier" perhaps to any number I applied it on so it would give me the function of a plus or minus sign. I can not think of anything. I tried using matrices but I can not find such operator. Appreciate your advise. Thanks.

when i am using r=1 , it works good ( value of Vs) but i want to calculate for the range of values from 1 to 10. I already tried using in matrix form and semi colon form but still it is giving me error. Please help somebody

Can anyone recognize which software do these pressure diagram charts are made from? Can Mathcad do anything of this nature? Thanks

Hello,   I have a problem implementing a recursive funcion in Mathcad Prime 3.1, hope someone can help me make it work. I want to calculate a heat transfer layer per layer. So the array should work like this: T_layer,time Here's what I want it to do: Take given Temperature T_0,0 and given Temperature T_1,0 and calculate Q.dot_1,1. With Q.dot_1,1 and a given time increment (t) calculate Q_1,1. With Q_1,1 and the mass (which is dependent on the layer) I want to calculate T_1,1. With it and T_0,1 (given) calculate Q.dot_1,2 and so on Meanwhile it should also calculate the other layers. So T_1,0 and T_2,0 (both given) to Q.dot_2,1 with t to Q_2,1 with the mass to T_2,1. Now T_2,1 and T_1,1 (from the first layer calculation) to Q.dot_2,2 and with t to Q_2,2 and so on. I hope I could explain it well enough. Thanks in advance, David EDIT: Thanks to FredKohlhepp I zipped and uploaded the worksheet

Hello to all,   I am having another 'simple' moment where I am going round in circles and am starting to feel a bit dim.   In the attached is a simple thermo question I am trying to complete.   I have completed a-c with some ease but am struggling with d. where the hint is to evaluate the integral of pressure over dVolume in the associated Pressure/Volume graph.    I know that the integral of an isothermal expansion is either P*V*In(r) = heat supplied or m*R*T*In(r)   Where P and V are the initial (Pre-expansion) Pressure and Volume respectively and r is the ratio of expansion i.e. V2/V1. m being mass and R being the gass constant.    As all figures given are specific i.e. no mass of air is specified I don't beleive I can use mRTIn(r) but cannot evaluate PVIn(r) as I don't know what the initial volume is...   I know that the heat supplied (well my calculations beleive it is) 187.5 kJ/kg.    I beleive the approach is to calculate th

I have this formula  but some time the expression is divided by zero . How to disregard this warning ?        

I'm wondering if there is a simple way to perform this, as I can't figure it out.   Let's saying we're using a solve block to develop a solution - in this case the flow through multiple orifices in series.  Easy enough to enter the equations and solve as follows:   But if we have 10 orifices, that's a lot of typing.  Is there a way to use indices or otherwise simplify this?  I was thinking of something along these lines, but can't get it to work.  Judging by the error maybe it's impossible.       This still shows N=2 orifii as a starting point, but the table could have 2, 3, .. N rows.   Any thoughts or solutions would be appreciated. 4.0 attached. Thanks!

I'm trying to compute the stress in a thick walled cylinder using a matrix that has two pressure values stored in it. When my supervisor and I were going over the calculations, we noticed that one form of our von Mises stress formula will give the correct answers, while another equivalent form of the exact same formula will give erroneus values. However, when I set the pressure variable to just one of the values that are included in the matrix, it computes it correctly. Is this a bug with Mathcad, or am I doing something wrong?

Hello to All!   I am for some reason struggling with what should be very basic. This is part of a worked Thermo Dynamics problem and I have followed all logic to the final point where the final volume in a piston is to be found. In the attached screen shot you can see the numbers I am working with. However I have triend substituting in the gas law to the 1st law of thermo dynamics and have not been able to create an identity between the two sides and likewise can't follow the logic of "Tfinal can be eliminated to give Vfinal" any help, as always, really appreicated.   Cheers,   Andy  

There is a formula for the shape of the heart - not the anatomical heart, and the RomanticI derived an approximate formula for the shape of human kidneys.1. Do you know the formula for the shape of a real heart?2. I'm looking for formulas for the lungs, stomach, liver and other internal organs of a person. More about this problem Tomography  

Study 29 of the book "Physical and Mathematical Studies with Mathcad and Internet" Color drawings, animations and files of the study 29 Figs and Sheets

Hello, Can you merge or join 2 mathcad prime files together and save it as one file? I don't want to use the copy and paste, I have different headers, footers etc, and copy/paste creates a mess.

I would like to get vectors X, Y and Z with random numbers? But a random numbers is only in last elements. Why? See please the attach with archived Mathcad 15 sheet!