Ayellow car passes a red car on the highway. from the yellow car's perspective, the red car is moving backward at a speed of 12 km/h. if the red car is moving at 75 km/h relative to the ground, what is the ground speed of the yellow car?

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.