an example of radiation

The most common example of radiation is the light coming from the sun. Where heat from the sun’s light is transferred onto our skin which everyone can feel.

Radiation can be used as well in the kitchen such as in microwave ovens where heat comes from “electromagnetic waves” released by the machine.

more about radiation

Radiation is the type of heat transfer which occurs through space.

Radiation is the kind of heat transfer that occurs without the need of heating surrounding molecules but rather directly towards the solid object that stands in the way of the radiant energy.

an example of convection

An example of convection is boiling water. Heat coming from the bottom of a pot, is transferred to water. Molecules of water at the bottom of the pot begin to vibrate and move around, transmitting heat energy as these molecules collide with one another. The energy is then transmitted or transferred from the deeper portions of the water towards its surface. The molecules of water that gain enough energy may escape the liquid form and transfer into the air.

differences and similarities between conduction and convection

The principle of conduction and convection is the same; heat is transferred from an area where there is more warmth to an area which is cooler. (similarities)

Conduction refers to the transfer of heat energy through solids; convection on the other hand refers to the transfer of heat through liquids and gases. (differences)

the concept of conduction

In solid objects like a metal rod, when one end of which is heated, the heat is transferred from the area where the heat is applied to the area away from the source of heat through the movement of the molecules that make up that object.

an example of conduction

When toasting marshmallows on a camp fire where heat may be felt on the stick after a few minutes is an example of heat transfer by conduction.

computers and conduction

In conduction, the idea that different objects have different levels of tolerance for heat are currently being used in computers in order to decrease the amount of heat energy being produced by such objects.

conduction

Heat conduction refers to the transfer of heat by molecular agitation without any motion of the material as a whole. This means that in solid objects like a metal rod when one end of which is heated, the heat is transferred from the area where the heat is applied to the area away from the source of heat through the movement of the molecules that make up that object.

heat transfer categories

Heat transfer mechanisms can be grouped into three catagories: conduction, convection, and radiation. The images above explain these three catagories.

radiation properties

Radiation can happen without giving consideration to change or differing temperatures. Also, it has to be noted that the rate of energy emitted by an object depends on the temperature.

types of convective heat transfer

First, the free convection wherein gravity is utilized to allow the movement of fluids. Second, the force convection where fans are used to initiate the movement of fluids.

radiation

It is a process by which emission of electromagnetic waves facilitate the transfer of heat. Although radiation can happen without giving consideration to change or differing temperatures.

convective heat transfer

This process is different from the former because convection currents are formed in the liquid due to the different density property of hot and cold substances. This is the more dominant process of heat transfer and allows the transfer through the movement of hot particles of the liquid over the cold portions.

fundamental process of heat transfer

There are three fundamental processes by which heat is transferred. Fluids usually act differently with other matter on Earth. In this case, heat transfer between fluids hold separate process because of its property. This kind of heat transfer process is termed to as conduction. In conduction, the heat moves internally because the fluid does not flow. The atoms and molecules vibrate independently, thus, electrons carry heat fast. Metals for example are good conductors of heat because they contain free electrons that move randomly.