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Problem 1
Calculate the work done in breaking up a drop of petrol of volume 1 cm3 into 109 drops. Surface tension of petrol is given as 26 dynes/cm.
Problem 2
Find the pressure difference inside and outside a rain drop of diameter 0.02 cm. What would be this pressure if on evaporation, drop reduces to a size of 2x10-5cm .
Problem 3
Water rises to a height of 5 cm in a certain glass capillary tube. In the same tube the level of mercury surface is depressed by 1.54cm. Compare the surface tensions of water and mercury. Specific weight of Mercury is 13.6 x103 Kg/m3 and that of water is
103 Kg/m3. Angle of contact of glass with mercury and water is 130° and 0°, respectively.
Problem 4
Experimental values of surface tensions of a few metals and other substances are shown below.
Material y, J/m2 T,°C
W (solid) 2.900 1727
Au(solid) 1.410 1027
Estimation of three dimensional pressure, P, for the solid surface (W and Au, respectively).
Assuming the thickness of the interaction is a few atomic layers (-1 nm)
Why a substance is being heated at a fast rate the temperature of decomposition
Assist with the setting of design variables necessary for sizing equipment
Use Laplace transformation to solve the initial value problem
Equal rates of mass transfer for the production of the fine chemical are required. This is often required for certain types of organic synthesis.
Application of reverse osmosis principles for the desalination of sea water
Prepare the design and evaluation of a new chemical manufacturing process.
Adsorption and Membrane Processes
Draw T-S diagram of the cycle.
The potential energy between two atoms A and B are constants and r the interatomic separation distance.
Implications of the future of fabrication for international trade, transportation, and logistics
The atmospheric pressure of 100k Pa acts on the other side of the piston. The gas is heated until the volume is doubled and the final pressure is 500 kPa. Calculate the work done by the gas.
Evaluate particle diameter at different terminal gas velocities
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