• gnu@lemmy.zip
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      5 months ago

      You pour a bit of boiling water down the side of the cylinder then run your hand down where you poured the water - you will feel a clear delineation in the temperature of the cylinder at the level of the liquid gas inside.

    • homesnatch@lemm.ee
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      5 months ago

      The method described reveals the level of liquid within the container. There is a distinct difference above and below.