Which sentence has a misplaced adjective clause?
a. the water slide that greets you at the park's entrance is huge!
b. we placed our chairs by the pool's edge, which were bulky and difficult to carry.
c. the lifeguard, who is a college student, paid close attention to the storm clouds.
d. the children especially enjoyed the water slide, which deposited them into the deep end of the pool.

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.