Engineering, 10.10.2019 03:30 linaaaaa7
An axis has a horizontal leadscrew that moves a 150 lb load. the screw has 5 threads per inch (p = 5 rev/in), ⇢ = 4.48 oz/in3 density, 42 in length, ⌘ = 0.75 eciency and 1.5 in diameter. the linear bearing friction coecient is µ = 0.15. the motion profile is trapezoidal with ta = td = 150 ms, tm = 1s, tdw = 0 s and vm = 2 in/s. all coupler inertias and carriage inertia are negligible. the servomotor has jm = 6.56 oz in2 inertia. calculate the peak and rms torques (in units of oz in) required for this application
Answers: 3
Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
Engineering, 04.07.2019 18:10
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
Engineering, 04.07.2019 18:20
For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor
Answers: 3
An axis has a horizontal leadscrew that moves a 150 lb load. the screw has 5 threads per inch (p = 5...
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