Convection currents.
temperature
Heat flows towards cold.
Convection currents.
The direction of flow of charge is determined by the electric field present in a circuit. Charge will flow from areas of higher potential energy to lower potential energy, following the direction of the electric field.
To determine the direction of air flow in an AC unit, you can hold a tissue or a lightweight piece of paper near the vents. The direction the paper moves will indicate the direction of the air flow.
Yes, heat flows from hot to cold.
A heat engine uses energy to work and exhaust heat that can't be used. Thermodynamics constrain the operation of a heat law and apply the conservation of energy to the system while limiting the possible efficiency of the machine to determine the direction of flow.
human
Yes, Heat always flows from the coldest to Hottest point in an object
Heat flows from hot to cold in a system.
Heat flows from hot to cold.
If your talking about fluid or air heat rises.