A possible ideal-gas cycle operates as follows: (i) from an initial state (p1, V1) the gas is cooled at constant pressure to (p1, V2); (ii) the gas is heated at constant volume to (p2, V2); (iii) the gas expands adiabatically back to (p_1, V_1). Assuming constant heat capacities, show that the thermal efficiency is 1 - gamma (V_1/V_2) - 1/(p_2/p_1) - 1 (You may quote the fact that in an adiabatic change of an ideal gas, pV^gamma stays constant, where gamma = c_p/c_v.)

d is the correct answer

the answer for apex is the lowest

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.