Which of the following combinations of bends can be used in a conduit run? A. One 90-degree, three 45-degree, and four 30-degree
B. TWO 90-degree, two 45-degree, and four 30-degree
C. Two 90-degree, four 45-degree, and one 30-degree
D. One 90-degree, six 45-degree, and one 30-degree

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1

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?

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false