For the A to Z in April Challenge 2019 I have picked some words, which are connected with physical space.
M is for meniscus – observed where
The surface of a liquid meets
Its container’s wall and the air.
Physicists record the angle among other feats.
I can remember learning about surface tension at school. (In the UK we call education to the age of sixteen or eighteen ‘school’. I know my friends in the US use the word ‘school’ to describe what we call ‘university’. Some pupils/students attend college from the age of sixteen.)
Before it was pointed out to me, I had not noticed that the surface of a liquid in a glass is not level all the way across. For most liquids the meniscus turns upwards at the edge. Mercury’s turns downwards.
When Jesus Christ turned the water into wine at the wedding in Cana, I doubt that anyone was interested in the meniscus in the water jars or the drinking vessels!
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