Heat energy always flows from
a. larger objects to smaller objects.
b. heavier objects to lighter objects.
c. cooler objects to warmer objects.
d. warmer objects to cooler objects.

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

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?

Describe the work performed by a ski lift in terms of kinetic and gravitational potential energy