Asmall ideal two-stroke, single cylinder model otto engine has a compression ratio of 5: 1. the intake air is at 14.7 psi and 80°f. the cylinder has a 0.75 in bore and the piston has a 1 in stroke. if the highest cycle temperature is 700°f, determine the net power ouput of this engine in [ftlbm/s] when it is running at 800 rpm.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

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?