Engineering Answers

Two shafts, having axes in the same plate intersecting at an angle of 45°, turn in opposite senses at 30 rpm and 90 rpm. Draw a pair of cone to be located on these shafts and turn in pure rolling contact. Diameter of base of smaller cone is 1 in. Calculate the cone angles.

Two solids of right section 2 and 4 are in pure rolling contact between the circular arcs. What is the angular speed ratio for the position shown? Determine the size of the angles , β, and Ø in degrees, and of the radii x and y in inches.

Carbon Dioxide at P1= 500 psia, V1= 1 ft^3/min, and t1=200 F are cooled at constant volume to 130 F in an internally reversible manner. For mdot=0.9 lbm/min, determine pdv and - Vdp. For nonflow process, find p2, DELTA u, DELTA h and Q. Also compute delta S.

List a complete set of customer needs for cross-country skis to allow skiing on dirt or 

grass. Divide the list of customer needs into “must haves” and “wants.”

A gas initially at P1= 827,400 Paa and v1=2.6 li undergoes a process and change state to a point where p2=275,800 Paa and v2=6.2li. If the internal energy decreases 123 KJ and Cp=295 J/kgm-K, determine (a) Cv, (b) delta H, and (c) R.

Define: i. Cut-in speed ii. Cut-out speed iii. Yaw control iv. Coefficient of performance of a wind mill