A difference in temperature
A difference in charge
Light heat or sound
A device to get a current flow through a wire (i.e. from a battery) and no breaks in the wire.
No, heat does not flow indefinitely. Heat stops flowing the temperatures are equal.
When both temperatures are the same, heat does NOT flow between objects.
sun
Heat & pressure.
A difference in charge
The condition that does not heat to enter or leave the system.
sun
Light heat or sound
negative pressure is needed for a sustained flow of water in a pipe.
negative pressure is needed for a sustained flow of water in a pipe.
The only two things needed for current flow are electromotive force or voltage and a conductor. The amount of current flow will depend on the "Resistance" in the circuit.
A device to get a current flow through a wire (i.e. from a battery) and no breaks in the wire.
No. That condition is necessary but not sufficient.No. That condition is necessary but not sufficient.No. That condition is necessary but not sufficient.No. That condition is necessary but not sufficient.
In a convection current, heat flows with the heated molecules as they move around in the liquid or gas. In a solid, the heat transfers via condition