If a person is a regular marijuana user, they may be ... A. under-performing at school.
B. over-achieving at school.
C. average at school.

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.