If the atmospheric pressure at sea level is 7.5 N/cm2, determine the pressure at a height of 3000m assuming the pressure variation follows isothermal law. The density of air is given as 1.2 km/m3.

← Prev Question Next Question →

1 Answer

Related questions

+1 vote

1 answer

Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm2 and temperature is 25℃ assuming air is incompressible. Take density of air as 1.2 kg/m3. Neglect variation of g.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm^2 and 25℃ respectively. The temperature lapse rate is given as 0.0065 ℃ /m. Take density of air at sea level equal to 1.2 kg/m^3.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

The barometric pressure at sea level is 760 mm of Mercury while that on a mountain top is 715 mm. If the density of air is assumed constant at 1.2 kg/m^3 , what is the elevation of the mountain top?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

As we go upwards, at height there is slight decrease in pressure variation.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

A closed tank (each side of 5 m) is partially filled with fluid as shown. If the pressure of the air above the fluid is 2 bar, find the pressure at the bottom of the tank. Assume the density ρ of the fluid to vary according to the given relation:

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A Differential manometer is connected at the points A and Bat the centre of two pipes. The pipe A(left limb) contains a liquid of specific gravity = 1.5 while pipe B (right limb)contains a liquid of specific gravity 0.85. The pressure at A and B are .5 kgf/cm^2 and 1.2 kgf/cm2 respectively. Find the difference in level of mercuru in the differential manometer. A is 2.5m above B and 5 m above the mercury in its own limb. B is 2.5 m above the mercury level in limb A.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

Pressure variation for compressible fluid is maximum for which kind of process?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

The pressure at a point in the fluid is 4.9 N/cm2. Find height when the fluid under consideration is in oil of specific gravity of 0.85.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

Why can’t the density be assumed as constant for compressible fluids?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

What is the variation observed in temperature in atmosphere with respect to elevation?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A beaker is filled with a liquid of density ρ1 up to a certain height. A is a point, h m downwards from the free surface of the liquid as shown. The liquid is replaced by equal volume of another liquid of density ρ2. If ρ1 > ρ2, how will the pressure at point A change?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

Three beakers 1, 2 and 3 of different shapes are kept on a horizontal table and filled with water up to a height h. If the pressure at the base of the beakers are P1, P2 and P3 respectively, which one of the following will be the relation connecting the three?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A simple U tube manometer connected to a pipe in which liquid is flowing with uniform speed will give which kind of pressure?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

For dynamic fluid motion in a pipe, the pressure measurement cannot be carried out accurately by manometer.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A rectangular pontoon is 5 m long, 3 m wide and 1.40 m high. The depth of immersion of the pontoon is 0.60 m in seawater. If the centre of gravity is 0.7 m above the bottom of the pontoon, determine the metacentric height. The density for seawater = 1045 kg/m^3.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

The arm of a teapot is 10 cm long and inclined at an angle of 60^o to the vertical. The center of the arm base is 2 cm above the base of the beaker. Water is poured into the beaker such that half the arm is filled with it. What will be the pressure at the base of the beaker if the atmospheric pressure is 101.3 kPa?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A beaker is filled with a liquid of density ρ1 up to a certain height. A is a point, h m downwards from the free surface such that the pressure at A is P. If the liquid is replaced by equal volume of another liquid of density ρ2, at what distance from the free surface will the pressure be P now?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

A beaker of height h is filled with a liquid of density ρ up to a certain limit. The beaker is rotated by an angle θ such that further increase in the angle will result in over flow of the liquid. If the liquid surface is exposed to the atmosphere, what will be the gauge pressure at point B?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A beaker is filled with a liquid of density ρ1 up to a certain height. The pressure at the base of the beaker id Pb. If the liquid is replaced by an equal volume of another liquid of density ρ2, what will be the pressure at the base of the beaker now?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

The surface tension of fluid in contact with air at 25℃ is 0.51N/m. The pressure inside a droplet is to be 0.05 N/cm2 greater than outside pressure. Determine the diameter of the droplet of water.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

A tank of height 3 m is completely filled with water. Now two-third of the liquid is taken out and an equal amount of two other immiscible liquids of specific gravities 0.8 and 1.2 are poured into the tank. By what percent will the pressure at the base of the tank change?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

A beaker of height 15 cm is completely filled with water. Now two-third of the liquid is taken out and an equal amount of two other immiscible liquids of specific gravities 0.8 and 1.2 are poured into the tank. What will be the pressure (in kPa) at a point situated at a height, half the height of the beaker?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

The diameters of a small piston and a large piston of a hydraulic jack are 45 mm and 100 mm respectively.Force of 0.09 kN applied on smaller in size piston. Find load lifted by piston if smaller in size piston is 40 cm above the large piston. The density of fluid is 850 kg/m3

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+1 vote

1 answer

A single coloumn manometer is connected to a pipe containing a liquid of specific gravity 0.75. Find the pressure in the pipe if the area of reservoir is 250 times the area of tube for the manometer reading. The difference in mercury level is 40 cm. On the left limb the fluid is upto the height of 20 cm.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

+2 votes

1 answer

A beaker is filled with a liquid of density ρ up to a height h. If half the liquid is replaced by equal volume of another liquid of twice the density, what will be the change in the base pressure?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

...