Question

the atmospheric pressure at a place is 75 cm of mercury. what doesit mean?​

Answer 1

hlo mate

The SI unit for atmospheric pressure is literally, ‘atmospheres’, with ‘atm’ written as shorthand

The conversion for atmospheres to related units are as follow:

1 atm = 101 325 Pascals (Pa, or Newtons per metre square, N m^-2)

1 atm = 75cm Hg

1 atm = 14.6959 PSI (pound force per square inch)

So to answer your question, 75 cm Hg is equal to 1 atmospheres , or 1 atm.

Hope it helped!! :))

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Answer 2

It means atmospheric pressure at that place is equal to pressure exerted by base of tube filled with 75 cm of mercury column. Density (d) of mercury is 13600 kg/m³...