In the chapter on psychoactive drugs within this week's module, a table shows various psychoactive drugs and the neurotransmitters that those drugs effect. Which of the following
neurotransmitters is effected by marijuana?
Serotonin
Blood
Acetylcholine
GABA

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.