If we were to increase the distance between the two point-charges in Q12 above from 1cm to 10cm, then the electric force between them would be

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)

Which model displays the change in a gas when the temperature of the gaseous system decreases?

What energy transformations occur each time the skateboarder rolls up the ramp?