Showing posts from March, 2013Show all
Society and environment
Discuss the impact of technological and cultural factors on Social Change.
(i) Geographical mobility in an industrial society is very important for job promotion. The workers must go to those p…
Society and environment
Is Sociology a Science? Discuss.
There is great controversy about the nature of sociology as a science. Some critics deny sociology to be claimed as sci…
Society and environment
Discuss the changing role and functions of the family.
Family as an association of men and women staying together in a common dwelling (house) place alone or with children hav…
Material science and engineering
Differentiate between Frenkel and Schottky defects?
Frenkel and Schottky defects Frankel Pairs : One such type of defect involves a cation-vacancy and a cation- inte…
Material science and engineering
Describe Fick's first law of diffusion. A plate of iron is exposed to a carburizing atmosphere on one side and a decarburizing atmosphere on the other side at 700 degree C. Under steady state condition calculate the diffusion flux of carbon through the plate, if the concentration of carbon at position of 5 mm and 10 mm beneath the carburizing surface are 1.2 kg/m3 and 0.8 kg/m3, respectively. Assume a diffusion coefficient of 3 * 1011 m2/s at this temperature.
Fick's First Law of Diffusion : The rate at which particles diffuse in steady state conditions i.e. when there are n…
Material science and engineering
Mention different types of Bravais lattices possible in crystalline materials. Show that the atomic packing factor (APF) of FCC crystal structure is 0.74.
The French mathematician Bravais from geometrical considerations that there can be only 14 different ways in which simil…
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