20. Gumby weighs 90-N in San Diego, but when climbs to the top of Mt. Rainier he only weighs 77.5-N. What is the acceleration due to gravity atop this mountain ? (I need to show work)

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

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)

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (in volts) across resistor 3?