If the beam is subjected to a shear of v = 30 kn, determine the web's shear stress at a and b. indicate the shear-stress components on a volume element located at these points. set w = 200 mm. show that the neutral axis is located at y = 0.2433 m from the bottom and i = 0.5382(10^-3) m^4. solve the problem for v = 50 kn instead of 30.

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

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false