During which changes of state doe the motion of the atoms decrease melting and deposition freezing and condensation condensation and evaporation vaporization and sublimation

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.