Engineering, 18.07.2019 01:20, ashtonbillups
Calculate (a) the equivalent number of vacancies per unit cubic meter in pure copper at 500° c and (b) the vacancy fraction at 500° c in pure copper. assume that the energy of formation of a vacancy in pure copper is 0.90 ev and boltzmann's constant k=8.62x105 ev/atom-k, pcu 8.96mg/m^3 t 24 124
Answers: 1
Engineering, 04.07.2019 19:20, lovenahofer
Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?
Answers: 3
Engineering, 06.07.2019 03:30, relic7391
The load on a bolt consists of an axial pull of 10 kn together with a transverse shear force of 5 kn. the bolt material has a yield strength of syt syc 100 mpa. find the diameter of the bolt at factor of safety n-0.5, n 1 and n-2 using maximum shear stress theory
Answers: 3
Engineering, 06.07.2019 04:10, jessicajustice6215
Cold water (cp=4180j/kg k) leadıng to a shower enters a thin-walled double-pipe heat transfer at 15c at a rate of 0.25kg/s and is heated to 45c by hot water (cp=4190j/kg k) that enters at 100c at the rate of 3kg/s. if the overall heat transfer coefficient is 950w /m2 k , determıne the rate of heat transfer and the heat transfer surface area of the heat exchanger using e - ntu method
Answers: 1
Calculate (a) the equivalent number of vacancies per unit cubic meter in pure copper at 500° c and (...
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