What are the method to trasfer heat?

* Occurs when two objects at different temperatures are in direct contact with each other.

* Heat flows from the warmer object to the cooler object.

* The rate of heat flow depends on the temperature difference between the objects, the surface area in contact, and the thermal conductivity of the materials.

Convection

* Occurs when a fluid (liquid or gas) is heated and moves from a warmer area to a cooler area.

* The heated fluid rises, and cooler fluid sinks.

* This creates a convection current.

* The rate of heat flow depends on the temperature difference between the fluid and the surrounding environment, the density of the fluid, and the viscosity of the fluid.

Radiation

* Occurs when heat is transferred through electromagnetic waves.

* All objects emit electromagnetic waves, but the amount of heat transferred depends on the temperature of the object.

* The higher the temperature of an object, the more electromagnetic waves it emits.

* The rate of heat flow depends on the temperature difference between the objects, the surface area of the objects, and the distance between the objects.