When it is blocked by an insulator or if your in the North Pole
damage to the heat pump
Heat always flows from warmer objects to cooler objects, unless you have a device (like a heat pump) to prevent this. The natural tendency is for two or more objects at different temperatures to eventually all have the same temperature and this is accomplished by heat flowing from the warmer objects to the cooler objects.
Flowing electricity is called electric current.
No.Ligtning is not a heat source.Unless u think that the electric of the lightning have heat.<<Previous answer:Yes.Fire is a heat source and a light source. If you were meaning light bulbs, then yes again. The electric current flowing through the filament (excuse spellings) causes the wire to glow (creating the light) and generate heat. This is caused by the resistance in the wire. Even tiny little leds generate heat and light. I may be wrong here.... but I dont think any light source does not generate heat of some kind. Heat is light radiation in the near and far infra-red range. You can have light sources that generate very very very little infra-red light, for example flourenscent lights produce light in the visible range almost exculsively BUT yes all light sources do produce some heat as an unavoidable energy loss.>> Lightning is a heat source. It is electricity rapidly flowing through a column of ionized air. Thunder is the shock wave it generates in the atmosphere. Think of the crackling noise a static filled blanket makes. Move it in the dark and you can see the static letting go - like lightning in miniature.
Electricity is most often generated at a power station by electromagnetically generators, primarily driven by heat engines fueled by chemical combustion or nuclear fission but also by other means such as the kinetic energy of flowing water and wind. So if the electromagnetically generators were to mix with the kinetic energy of the flowing water there will be so many bad damages if you were near the reaction.
when you close the heat off and let it cool down.
Equal temperature
Heat will stop flowing between the two bodies when they reach thermal equilibrium, meaning they both reach the same temperature. At this point, there is no longer a temperature difference driving the heat transfer, so no more heat will flow between them.
It'll stop flowing when all of the material has reached th same temperature.
When you stop breathing.
When the heat is traveling in the form of radiation, there's no reason for it to stop as long as the source is active. In the conductive and convective situations, the flow of heat from one material or object to the other stops when their temperatures are equal.
stop
You cant!
Heat flow between two objects stops when they reach thermal equilibrium, meaning they have the same temperature and there is no longer a temperature difference to drive heat transfer. At this point, the heat transfer between the objects ceases.
a convection current
When the heat is traveling in the form of radiation, there's no reason for it to stop as long as the source is active. In the conductive and convective situations, the flow of heat from one material or object to the other stops when their temperatures are equal.
Heat stops being transfered to another object when the other object becomes hotter than the original object the heat was radiating from (naturally). Its a law of thermodynamics that heat always goes from a hotter surface to a colder one.