Sanjay is making plans for his Saturday afternoon. He can choose a health-enhancing activity like lifting weights, or he can choose a sedentary activity such as watching TV. Sanjay weighs 185 pounds. In 30 minutes, how many more calories can Sanjay burn lifting weights than watching TV? Assume that he does not lift vigorously.

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)