What is the current in a series circuit that has two resistors (4.0 ohms and
7.5 ohms) and a power source of 9.0 volts?
A. 2.6 amps
B. 12 amps
C. 1.6 amps
D. 0.78 amps

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)