Engineering, 31.12.2019 04:31 renee9913
Boltzmann a gas containing n-1021 hydrogen atoms is heated to a temperature of 3 x 103 k. 1) on average, about how many atoms will have their electrons excited from the ground level s to the first excited level p? the s-level contains 2 states and the p-level contains 6 states, and the energy splitting is 10.2 evยท(you may ignore all the other hydrogen states.) o103 atoms 2 x 10* atoms 4 x 107 atoms 0 o5 x 109 atoms 6 x 1011 atoms
Answers: 2
Engineering, 03.07.2019 14:10
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
Answers: 3
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Burgers vector is generally parallel to the dislocation line. a)-true b)-false
Answers: 2
Engineering, 04.07.2019 18:10
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
Boltzmann a gas containing n-1021 hydrogen atoms is heated to a temperature of 3 x 103 k. 1) on aver...
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