Numerical (Water)

A shaft of diameter 120 mm is rotating inside a journal bearing of diameter 122 mm at a speed of 360 r.p.m. The space between the shaft and the bearing is filled with a lubricating oil of viscosity 6 poise. Find the power absorbed in oil if the length of the bearing is 100 mm.

Power Absorbed in Journal Bearing Problem Statement A shaft of diameter 120 mm is rotating inside a journal bearing of […]

A shaft of diameter 120 mm is rotating inside a journal bearing of diameter 122 mm at a speed of 360 r.p.m. The space between the shaft and the bearing is filled with a lubricating oil of viscosity 6 poise. Find the power absorbed in oil if the length of the bearing is 100 mm. Read More »

A piston 796 mm in diameter and 200 mm long works in a cylinder of 800 mm diameter. If the annular space is filled with a lubricating oil of viscosity 5 cp (centipoise), calculate the speed of descent of the piston in a vertical position. The weight of the piston and axial load are 9.81 N.

Piston Descent Speed Calculation Problem Statement A piston 796 mm in diameter and 200 mm long works in a cylinder

A piston 796 mm in diameter and 200 mm long works in a cylinder of 800 mm diameter. If the annular space is filled with a lubricating oil of viscosity 5 cp (centipoise), calculate the speed of descent of the piston in a vertical position. The weight of the piston and axial load are 9.81 N. Read More »

The capillary rise in the glass tube used for measuring water level is not to exceed 0.5 mm. Determine its minimum size, given that the surface tension for water in contact with air is 0.07112 N/m.

Minimum Tube Size for Capillary Rise Problem Statement The capillary rise in the glass tube used for measuring water level

The capillary rise in the glass tube used for measuring water level is not to exceed 0.5 mm. Determine its minimum size, given that the surface tension for water in contact with air is 0.07112 N/m. Read More »

Calculate the capillary rise in a glass tube of 3.0 mm diameter when immersed vertically in (a) water, and (b) mercury. Take surface tensions for water as 0.0725 N/m and for mercury as 0.52 N/m in contact with air. Specific gravity for mercury is given as 13.6.

Capillary Rise and Depression Calculation Problem Statement Calculate the capillary rise in a glass tube of 3.0 mm diameter when

Calculate the capillary rise in a glass tube of 3.0 mm diameter when immersed vertically in (a) water, and (b) mercury. Take surface tensions for water as 0.0725 N/m and for mercury as 0.52 N/m in contact with air. Specific gravity for mercury is given as 13.6. Read More »

The surface tension of water in contact with air is given as 0.0725 N/m. The pressure outside a droplet of water of diameter 0.02 mm is atmospheric (10.32 N/cm²). Calculate the pressure within the droplet of water.

Pressure Inside a Water Droplet Problem Statement The surface tension of water in contact with air is given as 0.0725

The surface tension of water in contact with air is given as 0.0725 N/m. The pressure outside a droplet of water of diameter 0.02 mm is atmospheric (10.32 N/cm²). Calculate the pressure within the droplet of water. Read More »

Determine the bulk modulus of elasticity of a fluid which is compressed in a cylinder from a volume of 0.009 m³ at 70 N/cm² pressure to a volume of 0.0085 m³ at 270 N/cm² pressure.

Bulk Modulus of Elasticity Calculation Problem Statement Determine the bulk modulus of elasticity of a fluid which is compressed in

Determine the bulk modulus of elasticity of a fluid which is compressed in a cylinder from a volume of 0.009 m³ at 70 N/cm² pressure to a volume of 0.0085 m³ at 270 N/cm² pressure. Read More »

The surface tension of water in contact with air at 20°C is given as 0.0716 N/m. The pressure inside a droplet of water is to be 0.0147 N/cm² greater than the outside pressure. Calculate the diameter of the droplet of water.

Droplet Diameter from Surface Tension Problem Statement The surface tension of water in contact with air at 20°C is given

The surface tension of water in contact with air at 20°C is given as 0.0716 N/m. The pressure inside a droplet of water is to be 0.0147 N/cm² greater than the outside pressure. Calculate the diameter of the droplet of water. Read More »

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