Mechanical Engineering Answers

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

2. Two parallel shafts connected by rolling cylinders turn in the same direction 150 rpm and 100 rpm respectively. The smaller cylinder is 16 in. in diameter. How far apart are the axes of the shafts?

VTU QUESTION-Steam issuing from a nozzle to a De - Laval turbine with a velocity of 1000 m/s. The nozzle angle is 20, the mean blade speed is 400m/s. The blades are symmetrical. The mass flow rate is 1000 kg/hr, Friction factor is 0.8, Nozzle efficiency 0.95. Taking the scale of = 1:100, find the following Graphically: i) Blade angles iv) Power developed ii) Axial thrust v) Blade efficiency iii) Work done per kg of steam vi) Stage efficiency

Carbon Dioxide at P1=500 psia, V1 = 1 ft3/min, and t1=200 F are cooled at constant volume to 130 F in an internally reversible manner. For m=0.9 Ibm/min, determine ſ pdv and – f vdp. For nonflow process, find P2, delta U, delta H, and Q. Also compute for delta S.

A new thermometer is invented where the temperature scale is in degrees G. The boiling point of water is 900°G and the freezing point of water is 120°G. Correlate this scale with the Kelvin and Rankine scales

2. Two parallel shafts connected by rolling cylinders turn in the same direction 150 rpm and 100 rpm respectively. The smaller cylinder is 16 in. in diameter. How far apart are the axes of the shafts? Please explain the answer.