Question

The pressure of 20cm of mercury is

Answer 1

Answer:

Given:pressure exerted by mercury column

Pm=hm*dm*g(say)

Pressure exerted by water column

Pw=hw*dw*g(say)

But, pm=pw

=>hm*dm=hw*dw

Or. hm=hw*dw/dm

Putting the value, 20*0.02*1000/13.6*1000

Answer=0.0142metre

I think this question will be solved

Explanation:

Answer 2

Therefore the pressure exerted by 20 cm of mercury is 26,683 Pa or 26.68 KPa.

Given:

The height of mercury column = h = 20 cm

To Find:

The pressure of 20 cm of mercury.

Solution:

The given question can be solved very easily as shown below.

Given that,

The height of mercury column = h = 20 cm = 0.2 m

The acceleration due to gravity = g = 9.81 m/s²

The density of mercury = ρ = 13,600 kg/m³

The pressure exerted by mercury = P = ρgh

⇒ The pressure exerted by mercury = 0.2 × 9.81 × 13,600 = 26,683 Pa = 26.68 KPa

Therefore the pressure exerted by 20 cm of mercury is 26,683 Pa or 26.68 KPa.

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