The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in liquid level?

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The rise in the level of a liquid in a tube is h. What will be the rise in the level if the same amount of liquid is poured into a tube of half the diameter.

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

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The ratio of the surface tension S and density ρ of liquid 1 and 2 are 1:2 and 1:4 respectively. Equal amount of the two liquids is poured into two identical tubes. what will be the ratio of the rise in the liquid level in the two tubes? (Assume the angle of contact to be same)

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Determine the minimum size of glass tube that can be used to measure water level if the capillary rise in the tube is restricted to 5mm. Consider surface tension of water in contact with air as 0.073 N/m

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Will capillary rise occur and if it occurs what will be capillary rise if glass capillarity tube is immersed in water and experiment is carried out by astronauts in space.

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If a fluid of certain surface tension and diameter is used to create a soap bubble and a liquid jet. Which of the two, bubble or liquid jet, will have greater pressure difference on the inside and outside.

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

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Find the capillarity rise or fall if a capillary tube of diameter .03m is immersed in hypothetical fluid with specific gravity 6.5, surface tension 0.25 N/m and angle of contact 147°.

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

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What will be the diameter (in mm) of a water droplet, the pressure inside which is 0.05 N/cm^2 greater than the outside pressure? (Take surface tension as 0.075 N/m)

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

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For liquid fluids will capillarity rise (or fall) increase or decrease with rise in temperature.

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Calculate the magnitude of capillary effect in millimeters in a glass tube of 7mm diameter, when immersed in mercury. The temperature of the liquid is 25℃ and the values of surface tension of mercury at 25℃ is 0.51 N/m. The angle of contact for mercury is 130°.

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

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Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?

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

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A soap bubble of d mm diameter is observed inside a bucket of water. If the pressure inside the bubble is 0.075 N/cm^2, what will be the value of d? (Take surface tension as 0.075 N/m)

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

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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)

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Capillarity fall is reduced if we take the appartus (capillary tube immersed in fluid having acute angle of contact) considerable distance inside the earth( i.e below the earth crust).

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

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A water drop of diameter 1 cm breaks into 1000 similar droplets of same diameter. What will be the gain or loss in the surface energy? (Take surface tension as 0.075 N/m)

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

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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)

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A liquid jet of 5 cm diameter has a pressure difference of N/m^2. (Take surface tension as 0.075 N/m)

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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)

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An oil of vicosity 7 poise is used for lubrication between shaft and sleeve. The diameter of shaft is 0.6 m and it rotates is 360 rpm. Calculate the power lost in oil for a sleeve length of 160mm. The thickness of oil film is 1.0mm

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

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The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1 Poise. The upper plate is dragged to the right with a force of 5N keeping the lower plate stationary. What will be the velocity in m/s of flow at a point 0.5 cm below the lower surface of the upper plate if linear velocity profile is assumed for the flow?

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

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Cavitation is more pronounced in rough pipes than smooth surfaced pipes.

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

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Which of the following contribute to the reason behind the origin of surface tension?

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A large tank of height h is half-filled with a liquid of density ρ and other half-filled with a liquid of density 4ρ. A similar tank is half-filled with a liquid of density 2ρ and other-half filled with another liquid of density 3ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks)

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

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A large tank of height h is filled with a liquid of density ρ. A similar tank is half-filled with this liquid and other-halffilled with another liquid of density 2ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks)

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

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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)

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The shear stress at a point in a liquid is found to be 0.03 N/m^2. The velocity gradient at the point is 0.15 s^-1. What will be it’s viscosity (in Poise)?

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

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