Archimedes Principle states that an object will float if the weight of the water it displaces is equal or greater than the weight of the object. Weight is multiplied by the due to and mass is multiplied by . So after equating the two weights, the constants of and divide out. In practice, this means an object will float if its is equal to or than the of the .

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)