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Description
Flashcards by meggyloulou11, updated more than 1 year ago
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Created by meggyloulou11
almost 10 years ago
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| Question | Answer |
| Heat energy can be transferred by conduction, convection and radiation. | Heat radiation if the transfer of heat energy by infrared radiation. |
| Conduction and convection involve the transfer of heat energy by particles. | Conduction is the main form on heat transfer in solids |
| Convection if the main form of heat transfer in liquids and gases. | Infrared radiation can be emitted by solids liquids and gases. |
| Any object can absorb and emit infrared radiation, whether or not conduction or convection is taking place doesn't matter. | The bigger the temperature difference between a body and its surroundings, the faster energy is transferred by heating. |
| Infrared radiation is emitted from the surface of an object. | You can feel infrared radiation if you stand near something hot like a fire or recently parked car bonnet. |
| hot objects, cool surroundings emit more than absorb(cool down) Cool objects, hot surrounding absorb more(warm up) | |
| The hotter an object is, the more radiation it radiates in a given time. | |
| dark matt surfaces absorb infrared radiation better than light shiny surfaces. | light shiny surfaces reflect infrared radiation |
| solar hot water panels contain water pipes under a black surface, the heat is absorbed and warms the water in the tank. | |
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Image:
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light and shiny objects reflect IR radiation and dark matt surfaces absorb it!! |
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