Engineering, 29.10.2019 02:31 Wanna14ever
In a particular semiconductor material, the effective density of states functions are given by nc nc0· (t300)32 and nv nv0· (t300)32 where nc0 and nv0 are constants independent of temperature. experimentally determined intrinsic carrier concentrations are found to be ni 1.40 102 cm3 at t 200 k and ni 7.70 1010 cm2 at t 400 k. determine the product nc0 nv0 and the bandgap energy eg. (assume eg is constant over this temperature range.)
Answers: 3
Another question on Engineering
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 18:20
Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above
Answers: 1
Engineering, 04.07.2019 18:20
Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
Engineering, 04.07.2019 18:20
Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.
Answers: 2
You know the right answer?
In a particular semiconductor material, the effective density of states functions are given by nc nc...
Questions
Mathematics, 27.09.2019 04:00
Mathematics, 27.09.2019 04:00
Chemistry, 27.09.2019 04:00
Arts, 27.09.2019 04:00
Mathematics, 27.09.2019 04:00
Health, 27.09.2019 04:00
Mathematics, 27.09.2019 04:00
