Problem S-3a. A gaseous mixture of 30 mole% O2 (A, 32 g/gmole) and 70 mole% N₂ (B, 28 g/gmole) is diffusing through a porous medium. The total system pressure is 1.5 atm, and the temperature is 80 °C. (a) What is the molar concentration of N₂ in the gas mixture? (b) What is the molecular diffusion coefficient of O₂ in N₂? (c) If the temperature is increased from 80 °C to 160 °C, then scale molecular diffusion coefficient to the new temperature, assuming that the collision integral (2D), does not change from 80 to 160 °C.

please answer correctly and completly

In thermodynamics, it refers to the body or assemblage on which attention is focused.

. (Grinding Operations and Grinding Machines) (USCS units) In a centerless grinding operation, the grinding wheel diameter = 8 in, and the regulating wheel diameter = 5.0 in. The grinding wheel rotates at 1500 rev/min, and the regulating wheel rotates at 180 rev/min. The inclination angle of the regulating wheel = 2.3°. Determine the production rate of cylindrical work parts whose diameter = 0.5 in and length = 5.0 in. Solutions used; fr = TD₂N, sin I

Three metal pieces being cast have the same volume but different shapes; one is a sphere, one a cube, and other a cylinder with its height equal to its diameter. Which piece will solidify the faster and which one the slower?. .20

Question: A 6.4 mm (0.25 in.) diameter cylindrical rod fabricated from a 2014-T6 aluminum alloy (Figure 9.41) is subjected to reversed tension-compression load cycling along its axis.  If the maximum tensile and compressive loads are +5340 N (+1200 lbf) and –5340 N (–1200 lbf) , respectively, determine its fatigue life.  Assume that the stress plotted in Figure 9.41 (attached below) is stress amplitude.

The coefficient of skin friction for a pipe through which water is flowing with a Re of 1600 is

A polymer bar's dimensions are 1 inch x 2 inch and 15 inch long. The polymer has a modulus of elasticity of 600,000 psi. What force is required to stretch the bar elastically to 15.25 inches? 20,000 lb O 15.25 in O 1000 lb O 10,000 lb

This is a picture of a 10-mL graduated cylinder. The value for 'x' says 3 mL and the value for 'y' says a value 1 mL higher than 3. Record the value with proper estimation technique.

1. Calculate the pressure difference AP=Pg-Pa of the below manometer. Glycerin SG = 1.26 Water SG = 1.0 Oil SG = 0.88 60 cm 10 cm B 15 cm 20 cm Mercury SG = 13.5