Question

In cgs system 76 cm of mercury pressure is equal value

Answer 1

Given :

h=76cm

Pressure=?

Formula to be used : P=hgd

Where h = height of mercury column and

d= density of mercury =13.6 gm/cc

acceleration due to gravity=980 cm/s²

P=hgd=13.6 x 980x76=1012928 dyne.cm²

∴Pressure at 76cm of height of mercury is 1012928 dyne.cm²

Answer 2

CGS denotes centimeter gram second

SO,
P=hgd
where p is the pressure
h is the height of the column and d is the density
g is acceleration due to gravity
so,
h=76 cm
g=9.8m/s²
 = 980cm/s²
d=13.6gm/cm³
 
So,
P=hdg
  =76 × 980 × 13.6
  =1012928 dyne/cm²
  or 1012928 Ba