In a vertical piston-cylinder device, the piston is resting on a set of stops 0.082 m above the inner bottom surface of the cylinder. The cylinder contains CO2 initially at –20 C and 60 kPa. The mass of the piston is 1.5 kg and its diameter is 0.06 m. Assuming that the atmospheric pressure outside the device is 101 kPa, determine how much heat must be added to just lift the piston off the stops

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)