Skip to main content
J
JM_102417078-Gravel
8-Gravel
April 5, 2022
Solved

Units

  • April 5, 2022
  • 4 replies
  • 2269 views

Why there is small variance with units and without units results in Prime

Best answer by Werner_E
@JM_10241707 wrote:

Why there is small variance with units and without units results in Prime

Because you used an inaccurate value when you converted psf to psi as ssato already indicated. Use more decimals and you get the result accurate to more than the two decimals as shown in your sheet:

 

Werner_E_0-1649242263510.png

 

You can't expect the results to be the same up to nine decimals if your calculation uses a value which is just rounded to 2 decimals!

 

4 replies

ttokoro
21-Topaz I
ttokoro21-Topaz I
21-Topaz I
April 5, 2022

They are same with using same units.

 

t.t.
    T
    21-Topaz II
    terryhendicott21-Topaz II
    21-Topaz II
    April 6, 2022

    Hi,

     

    5*w*L^4/384/E/I

     

    Both E and I have units that have not been added on the worksheet.

     

    Cheers

    Terry

      S
      ssato15-Moonstone
      15-Moonstone
      April 6, 2022

      Hi,

       

      The number of significant digits in the unit conversion for "a" seems to be low.

       

      ssato_0-1649211931518.png

       

        W
        Werner_E25-Diamond IAnswer
        25-Diamond I
        April 6, 2022
        @JM_10241707 wrote:

        Why there is small variance with units and without units results in Prime

        Because you used an inaccurate value when you converted psf to psi as ssato already indicated. Use more decimals and you get the result accurate to more than the two decimals as shown in your sheet:

         

        Werner_E_0-1649242263510.png

         

        You can't expect the results to be the same up to nine decimals if your calculation uses a value which is just rounded to 2 decimals!

         

          Terms & ConditionsCookie settingsAccessibility statement