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  • Water Weight?

    What's the weight and volume of a column of water 1" in diameter x 100' long?

    I forgot. If I ever knew.

    J.C.

  • #2
    Re: Water Weight?

    it will weigh 34.04 pounds

    G3

    Comment


    • #3
      Re: Water Weight?

      Originally posted by G3sprinklers View Post
      it will weigh 34.04 pounds

      G3
      Is that off the top of your head, from a pocket-guide, or formula you just know?

      Thanks.

      J.C.

      Comment


      • #4
        Re: Water Weight?

        volume of cylinder

        v=(pi)(r2)(h)

        v=(3.1415)(0.5*2)(1200)
        since the radius is in inches the height will also need to be in inches

        v=942.45 cubic inches

        one cubic inch of water weighs 0.0361 pounds
        weight = (942.45 cubic inches)(0.0361 pounds/cubic inch)
        = 34.02 pounds

        What did you come up with??

        G3

        Comment


        • #5
          Re: Water Weight?

          top of the head formulas that I know, I have always loved word problems and conversions. Had a couple of great chemistry teachers that made learning easy.

          G3

          Comment


          • #6
            Re: Water Weight?

            Originally posted by G3sprinklers View Post
            volume of cylinder

            v=(pi)(r2)(h)

            v=(3.1415)(0.5*2)(1200)
            since the radius is in inches the height will also need to be in inches

            v=942.45 cubic inches

            one cubic inch of water weighs 0.0361 pounds
            weight = (942.45 cubic inches)(0.0361 pounds/cubic inch)
            = 34.02 pounds

            What did you come up with??

            G3
            Nice - WOW 0 WOW

            Your crazy smart

            Well. That's an answer for ya
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            • #7
              Re: Water Weight?

              not really, just something that I know a little about. Other things I know nothing about. Like I always say, "even the dumbest person knows something you don't".

              G3

              I don't know much about jetting, drain cleaning or women.
              Last edited by G3sprinklers; 02-04-2010, 10:39 PM.

              Comment


              • #8
                Re: Water Weight?

                Originally posted by G3sprinklers View Post
                volume of cylinder

                v=(pi)(r2)(h)

                v=(3.1415)(0.5*2)(1200)
                since the radius is in inches the height will also need to be in inches

                v=942.45 cubic inches

                one cubic inch of water weighs 0.0361 pounds
                weight = (942.45 cubic inches)(0.0361 pounds/cubic inch)
                = 34.02 pounds

                What did you come up with??

                G3
                I can't lie to you. I was on the phone and didn't even get started. I hope to learn this well enough to put in the memory bank.

                Many thanks.

                J.C.

                Comment


                • #9
                  Re: Water Weight?

                  If you are looking for psi at 100', then the constant for water pressure (PSI) is 0.433 lbs per foot. So if the water is fresh drinking water, and the column is vertical and equal to or more than 1 square inch area, the answer is 43.3 psi. Doesn't matter if the pipe is 1 1/4"d or 3'. A 1" diameter pipe is only .78539... square inches. 43.3 x .78539... = 34.00774..lbs.

                  34+ lbs is a good answer.

                  Go
                  Last edited by Gofor; 02-04-2010, 11:33 PM.
                  Practicing at practical wood working

                  Comment


                  • #10
                    Re: Water Weight?

                    Originally posted by Gofor View Post
                    The constant for water pressure (PSI) is .433 lbs per foot. So if the water is fresh drinking water, and the column is vertical, the answer is 43.3 lbs. Pure water weighs less.

                    Go
                    You gonna' take that G3?!?!? Go NASA on him!

                    J.C.

                    Comment


                    • #11
                      Re: Water Weight?

                      JC you asked what the water would weigh, not how much pressure it would have at the base of a column.

                      Gofor is correct as long as it is at sea level and the water is at 72* F (if I remember that right)

                      That is all that I could add to it.

                      G3

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