What are three possible ways in which heat is transfered?

Answer 1

The three most common types of heat transfer are convection, radiation, and conduction.

Conduction ---> (a teaspoon dipped in hot water)

Convection ---> (a pot of boiling water)

Radiation ---> (how the sun's heat reaches the Earth's surface)

Answer 2

Conduction, convection and radiation

Conduction is the process in which heat is transferred from one particle to the other due to passing over the vibrational or kinetic energy. Mostly in solids conduction takes place.

In case of convection, the particle themselves move to take over the heat energy. Mostly in liquids and gases we have convection.

Both conduction and convection need a material medium But radiation does not need a material medium. Even through vacuum heat energy will be propagated in the form of electro magnetic waves. Example heat energy comes from sun to the earth through empty space.

Answer 3

Conduction, convection and radiation are the three common forms of heat transfer.

(This excludes the type of heat transfer which is forced, e.g. heating and air conditioning systems where a fan moves air from one location to another.)

Conduction: When one region of an object is warmer than another, we say heat flow from hot to cold. This is the dominant process we see occurring in solid objects. Since "hot" means atoms or moving (vibrating) faster, the greater motion (greater energy) of atoms in one part of an object are transmitted to its neighboring atoms by interactions (forces) between adjacent (nearby) atoms. One sometimes hear this explained as atoms colliding with its neighbors and more energetic atoms transmitting energy through collision. That is an over simplification since atoms do not actually bang into one another, but it gets the basic idea across.

Convection: When a fluid has one region warmer than another, conduction will occur, but there is often mass transfer as well. Typically, warmer regions expand and therefore have a lower mass density, e.g. warm air is lighter than cold air. Being a fluid, the region of low density is buoyant, i.e. tends to float upward in a gravitation field. Equally, one can say the colder region is denser and tends to sink in the fluid. As the material moves, rising or sinking, it carries its thermal energy with it and so physically moves the heat by moving the matter itself.

Radiation: Radiative transfer means that heat energy is converted to electromagnetic energy and electromagnetic energy travels away from a hot object. (Sunshine is the traditional example.) Heat energy is, by definition, the energy stored in the thermal motion of moving atoms and molecules of a material. (We will not extend this discussion to more exotic situations, such as a plasma, when the material has constituents other than atoms.) All hot objects all give off electromagnetic energy. If it is hot enough, we say it is red hot or white hot and the electromagnetic energy we observe is in the visible spectrum. Less obviously, but no less importantly, heat may be converted to infrared or microwave and they travel away from the object. (Technically, the entire range of wavelengths is broadcast by a hot object which is the basis for Plank's law of black body radiation.) One example of radiative energy observed for thousands of years is the radiative energy given off by a fire. The light is such energy, but a person also feels the warmth of a fire from distances too great to be the heating of the air. A fire can give off infrared electromagnetic energy is observed as heat when it is absorbed by the skin.

There are more exotic ways for energy to move from one place to another. A super nova gives off a large amount of energy as neutrinos and that is pretty exotic. There are also simpler forms such as picking up an ice cube and carrying it to another location. The ice cube example is in the category of forced movement as mentioned above.

Conduction, convection and radiation are the three common natural forms of heat transfer that are part of daily experience and taught in physics and engineering courses.

Answer 4

conduction

convection

radiation

Answer 5

Conduction, convection and radiation (I hope that's right)

:)

Answer 6

conduction, convection and radiation. Conduction is througha soild medium, convection is through a liquid medium and radiation is through a gaseous medium.

Answer 7

Convection, conduction and radiation.