Concise Physics I.C.S.E Part I For Class 9>Chapter 4 - Pressure in Fluids and Atmospheric Pressure>EXERCISE–4(B)>Q 1

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Convert $1 mm of Hg$ into pascal. Take density of $Hg = 13.6 \times 10^{3} {kg m}^{- 3}$ and $g = 9.8 {m s}^{- 2}$ .

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Important Questions on Pressure in Fluids and Atmospheric Pressure

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Concise Physics I.C.S.E Part I For Class 9>Chapter 4 - Pressure in Fluids and Atmospheric Pressure>EXERCISE–4(B)>Q 2

At a given place, a mercury barometer records a pressure of

0.70 m of Hg

. What would be the height of the water column (in

m

) if mercury in the barometer is replaced by water? Take the density of mercury to be

13.6 \times 10^{3} {kg m}^{- 3}

.

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Concise Physics I.C.S.E Part I For Class 9>Chapter 4 - Pressure in Fluids and Atmospheric Pressure>EXERCISE–4(B)>Q 3

At sea level, the atmospheric pressure is $76 cm of Hg$ . If air pressure falls by $10 mm of Hg$ per $120 m$ of ascent, what is the height (in $m$ ) of a hill where the barometer reads $70 cm of Hg$ . State the assumption made by you.

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Concise Physics I.C.S.E Part I For Class 9>Chapter 4 - Pressure in Fluids and Atmospheric Pressure>EXERCISE–4(B)>Q 4

At sea level, the atmospheric pressure is

1.04 \times 10^{5} Pa

. Assuming

g = 10 {m s}^{- 2}

and density of air to be uniform and equal to

1.3 {kg m}^{- 3}

, find the height of the atmosphere in

m

.

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Concise Physics I.C.S.E Part I For Class 9>Chapter 4 - Pressure in Fluids and Atmospheric Pressure>EXERCISE–4(B)>Q 5

Assuming the density of air to be

1.295 {kg m}^{- 3}

, find the fall in barometric height in

mm of Hg

at a height of

107 m

above the sea level. Take the density of mercury

= 13.6 \times 10^{3} {kg m}^{- 3}

.