Propane (c3hs) is burned with air. analysis of the products of combustion shows that, the number of moles of : co2 is 8.6, co is 0.6, o2 is 7.2, h2o is 12.27, n2 is 83.6. determine the percent of theoretical air used in the combustion process

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way