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Except Helium, all noble gases have how many electrons in the outermost shell?
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If $${\sigma _{\text{t}}}$$ is the tensile stress for the shell material, then thickness of shell is equal to
Number of electrons in the outermost orbit of a semi-conductor is
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.
A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
In an intrinsic semiconductor, the number of free electrons
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At room temperature the number of conducting electrons in an intrinsic semiconductor
The impurity level in an extrinsic semiconductor is about of pure semiconductor.