In the vector addition lab, the following data was collected for determining the displacement from the door of the physics classroom to another location in the building: 2.0 m, west

22.0 m, south

25.0 m, east

9.0 m, north

4.0 m, west

the direction of the resultant displacement is closes to __ degrees.(use the counter-clockwise from east convention) enter a numerical answer

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.