Daphne is doing some last minute shopping, she cannot find a parking spot at the mall. She starts on the west side of the parking lot and drives east, looking for a spot. When she cannot find one, she drives north. At the north most point in the parking lot, Daphne finds a spot. What is her displacement?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.