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1. Consider an intrinsic material at 300 K. Under pressure, the band gap is reduced from 1.6 to 1.5 eV. By what factor does the electrical conductivity of this material increase?
2. Suppose you wish an intrinsic material to remain an electrical insulator at 800 K, having less than one conduction electron per cubic centimeter of material. What is the minimum band gap that is needed?
a turning operation calls for a single pass on a 3 diameter part down to 2.800 on a lathe using a hss high speed steel
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What is the slenderness ratio of a solid circular bar 30 in. long and 2 in. in diameter - calculate the slenderness ratio of a rectangular bar 1.5 in. x ¾ in. and 20 in. long.
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What sources of information have been used, where materials/information from this sources is quoted it must be clearly referenced using the Harvard Referencing System - calculated the electricity consumption of all household appliances in the home..
A saturated mixture of water at 1,100kPa is throttled (in a throttling process) to a temperature of 105 degrees C and a pressure of 100kPa. What is the quality of the steam in its initial state?
The temperature in a pressure cooker during cooking at sea level is measured to be 250 F. Determine the absolute pressure inside the cooker in psia and in atm. Would you modify your answer if the place were at a higher elevation?
a construction crew lifts about 560 lb of material serveral times during the day from a flatbed truck to a 32 foot
a pound of air is used in a carnot power cycle. at a constant 1540of the pressure goes from 2710 psia to 1882 psia.
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