Results 1 to 3 of 3
Like Tree1Thanks
  • 1 Post By frick

Thread: Can anyone help me with this equation please

  1. #1
    Newbie
    Joined
    Jun 2019
    From
    Brighton
    Posts
    3

    Can anyone help me with this equation please

    Can anyone help me with this equation please-screenshot-2019-07-18-11.23.59.png
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    11,493
    Thanks
    899
    Awards
    1

    Re: Can anyone help me with this equation please

    What equation? And what do you need help with?

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    May 2019
    From
    Kansas
    Posts
    7
    Thanks
    7

    Re: Can anyone help me with this equation please

    If I am reading this correctly, you are given the differential equation, $\displaystyle m\frac{dv}{dt}= -\frac{1}{2}\rho AC_{\rho}\nu^2- k\frac{dm}{dt}$ for rocket propulsion. We are further told that the fuel, which accounts for the mass, m, is being used at rate 6 kg/sec so, since m= 3000 initially, m(t)= 3000- 6t. You are first asked to substitute that for m as well as given values for $\displaystyle \rho$, A, $\displaystyle C_\rho$, etc. to arrive at the equation $\displaystyle \frac{d\nu}{dt}= \frac{18000- 0.15\nu^2}{3000- 6t}$. Have you done that?
    You are asked to use "Euler's method in Excel" to solve that equation. Do you have "Excel" on your computer? Do you know what "Euler's method" is? Do you know how to implement "Euler's method" in "Excel"? (I don't use "Excel" myself but I bet it has a built in "Euler's method" command!)
    Last edited by frick; Jul 20th 2019 at 05:40 AM.
    Thanks from topsquark
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: Feb 25th 2013, 09:32 PM
  2. Replies: 1
    Last Post: Apr 11th 2011, 01:17 AM
  3. Replies: 2
    Last Post: May 18th 2009, 12:51 PM
  4. Replies: 2
    Last Post: Apr 28th 2009, 06:42 AM
  5. Replies: 1
    Last Post: Oct 23rd 2008, 03:39 AM

/mathhelpforum @mathhelpforum