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Metallurgical Engineering Physical Metallurgy Difficulty: Medium

In the homogenous nucleation, as compared to heterogeneous nucleation

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Inan annealed metal, the density of dislocations is typically of the order of . . . . . . . . m -2 . Tata salt was tested (FCC) with X-ray (0.071nm) which is diffracted by (110) plane with lattice constant of 0.28nm. Find the diffraction angle for 2 nd order diffraction. The intensive thermodynamic variables among the following are: P. Pressure Q. Volume R. Temperature S. Enthalpy Determine the correctness or otherwise of the following Assertion (a) and Reason (r) . Assertion (a): During welding of aluminium alloys by the gas tungsten arc welding process, direct current reverse polarity (DCRP) mode is used. Reason (r): DCRP facilitate breaking up of the oxide film on the workpiece surface. The figure below shows water flowing through a pipe. The pressure difference between points P and Q measured using a water-over-mercury manometer is