What is the difference and similarity between conduction, radiation, and convection?

Question

Thank You!

Answer 1

Convection is the transfer of heat by

the actual movement of the warmed

matter. Heat leaves the coffee cup as

the currents of steam and air rise.

Convection is the transfer of heat

energy in a gas or liquid by

movement of currents. (It can also

happen is some solids, like sand.)

The heat moves with the fluid.

Consider this: convection is

responsible for making macaroni

rise and fall in a pot of heated water.

The warmer portions of the water

are less dense and therefore, they

rise. Meanwhile, the cooler portions

of the water fall because they are

denser.

Conduction is the transfer of energy

through matter from particle to

particle. It is the transfer and

distribution of heat energy from

atom to atom within a substance.

For example, a spoon in a cup of hot

soup becomes warmer because the

heat from the soup is conducted

along the spoon. Conduction is most

effective in solids-but it can happen

in fluids. Fun fact: Have you ever

noticed that metals tend to feel cold?

Believe it or not, they are not colder!

They only feel colder because they

conduct heat away from your hand.

You perceive the heat that is leaving

your hand as cold.

Radiation: Electromagnetic waves

that directly transport ENERGY

through space. Sunlight is a form of

radiation that is radiated through

space to our planet without the aid

of fluids or solids. The energy travels

through nothingness! Just think of it!

The sun transfers heat through 93

million miles of space. Because there

are no solids (like a huge spoon)

touching the sun and our planet,

conduction is not responsible for

bringing heat to Earth. Since there

are no fluids (like air and water) in

space, convection is not responsible

for transferring the heat. Thus,

radiation brings heat to our planet.

Answer 2

Conduction is the most significant means of heat transfer in a solid. On a microscopic scale, conduction occurs as hot, rapidly moving or vibrating atoms and molecules interact with neighboring atoms and molecules, transferring some of their energy (heat) to these neighboring atoms. In insulators the heat flux is carried almost entirely by phonon vibrations.



Convection is usually the dominant form of heat transfer in liquids and gases. This is a term used to characterise the combined effects of conduction and fluid flow. In convection, enthalpy transfer occurs by the movement of hot or cold portions of the fluid together with heat transfer by conduction.



Radiation is the only form of heat transfer that can occur in the absence of any form of medium (i.e., through a vacuum). Thermal radiation is a direct result of the movements of atoms and molecules in a material. Since these atoms and molecules are composed of charged particles (protons and electrons), their movements result in the emission of electromagnetic radiation, which carries energy away from the surface. At the same time, the surface is constantly bombarded by radiation from the surroundings, resulting in the transfer of energy to the surface.

Answer 3

Conduction...the place molecules in direct touch with one yet another bypass warmth skill from one to a distinctive (EX: solar's rays warmth the exterior of a rock and the warmth skill travels by skill of conduction to the interior pronounced rock.) Convection...the place heated molecules flow from place to place wearing the warmth with them (EX: Air molecules warmed by skill of the solar's rays flow from place to place as wind.) Radiation...the place skill travels as photons and strikes some molecules to set them vibrating and raise their temperatures (EX: the solar's rays are radiation; so whilst they strike that rock, the rock's molecules are all a quiver.) i think of you will discover how each type can impact the Earth's temperature. Conduction finally ends up interior the Earth itself being warmed up in the process the day; and that warmth is released at night whilst the solar is down. so as that serves to maintain the night's warmer than they had be in any different case. Convection is the stuff climate varieties are made up of. We call the fronts heat and chilly fronts for a reason. That reason is that the air is comparatively heat and chilly through fact the fronts bypass by skill of with their winds wearing the warmth (or lack thereunto). Radiation is the mummy of all warmth on earth. It comes from the solar and heats up the air and the floor. the place we see that as reradiated warmth from the Earth and convection heating by skill of the winds. (NB: there is basically a sprint warmth from the Earth's indoors, yet whilst in comparison with the solar's radiation warmth, it quite is amazingly small.)

Answer 4

Conduction and convection are basically the same thing. Conduction is through solids and convection is through fluids.