Skepticalscientists.weebly.com
|[pic] |Heat Transport |
| | |
| |
|Hot baths… radiators… log fires – all heat you up in different ways. |
| |
|There are three types of heat transport: conduction, convection and radiation. |
| |
|Conduction |
| |
|Conduction is the transference of thermal energy between neighboring molecules or atoms, and occurs in solids, liquids and |
|gases. |
| |
|When atoms get hot their vibrations increase. |
| |
|The hotter the atom, the more kinetic energy these vibrations have. |
| |
|When one atom collides with another, this energy is transferred. This is how heat is conducted from one substance to another. |
| |
|In this case between a hot liquid and cold metal. |
| |
|Conduction is the most direct method of transferring heat energy between two objects. |
| |
|Some materials are naturally good conductors of heat, while others are poor. Metals usually conduct heat extremely well, |
|whereas glass or wood do not. |
| |
|This explains why metal kitchen utensils heat up while wooden ones remain cool. |
| |
|Conduction: Transfer of thermal energy. Between molecules or objects in direct contact |
| |
| |
|Convection |
| |
|When a radiator heats the air around it, the air rises. |
| |
|Cold air fills in the space left by the rising hot air and the cycle repeats. |
| |
|This is convection. |
| |
|Convection only occurs within liquids and gases, because they expand when they are heated. |
| |
|As they expand, they become less dense and rise, creating convection currents. |
| |
|It’s convection currents which keep gliders in the sky. |
| |
|Convection: Transfer of thermal energy. By actual movement of warmed matter. Only occurs in liquids and gases. |
|[pic] |Heat Transport |
| | |
| |
|Thermal Radiation |
| |
|Objects which are hotter than their surroundings, such as a fire or the Sun, are radiating heat. |
| |
|Vibrating atoms emit infrared electromagnetic waves, which we detect as heat. |
| |
|Thermal Radiation: Transfer of thermal energy. By objects hotter than their surroundings. Radiated as electromagnetic waves |
| |
|All matter can emit or absorb thermal radiation, and, because no particles are involved, infrared radiation can even travel |
|through the vacuum of space. |
| |
|… Explaining how we can feel heat from the Sun emitted millions of kilometers away. |
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- getroman com reviews
- acurafinancialservices.com account management
- acurafinancialservices.com account ma
- getroman.com tv
- http cashier.95516.com bing
- http cashier.95516.com bingprivacy notice.pdf
- connected mcgraw hill com lausd
- education.com games play
- rushmorelm.com one time payment
- autotrader.com used cars
- b com 2nd year syllabus
- gmail.com sign in