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Hanuman_2000 Posted 13 years ago
Grammar

Pressure

Hello,

1. The fluid exerts pressure ......

Can we write the above as

a) The fluid exert a pressure ....

As I have looked at the dictionary the word "pressure" is countable as well as uncountable noun.

I am bit confused how to use the same noun as countable and uncountable such as "pressure".

Thanks.
  

Top answer

If there's no unit, we usually use the uncountable version. "The fluid exerts pressure on the surface. " just means there's some unknown force acting on the given area.

— Ozzourti

  • If there's no unit, we usually use the uncountable version.
  • "The fluid exerts pressure on the surface.
  • " just means there's some unknown force acting on the given area.
  • " -- here we know the exact value.
  • And of course if we were talking about several measurements of pressure, we would use the countable version to refer to each or all readings.
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1 Answers
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If there's no unit, we usually use the uncountable version.

"The fluid exerts pressure on the surface." just means there's some unknown force acting on the given area.

But:

"The fluid exerts a pressure of 10 kPa on the surface." -- here we know the exact value.

And of course if we were talking about several measurements of pressure, we would use th
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