782701
Descrição
FlashCards por Becca Westwell, atualizado more than 1 year ago
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Criado por Becca Westwell
mais de 10 anos atrás
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| Questão | Responda |
| U-values | A u-value is the amount of energy that passes through 1 metre squared of material. The lower the u-value the better the insulator and the less energy lost. |
| Dense | Dense is how tightly packed particles are. |
| Conduction | Conduction is the transfer of energy in a solid. |
| Radiation | Radiation is the transfer of heat energy using waves. No particles are needed.Everything gives off radiation; different surfaces give off different amounts. |
| Convection | Convection is the transfer of energy in a fluid - a liquid or gas. |
| Efficiency | Efficiency is how well a machine changes energy into useful forms of energy. Efficiency = (Useful energy out/total energy in) x 100 |
| Energy used | Energy used = power(kw) x time(h) |
| Infrared radiation | Energy transfer by electromagnetic waves. All objects emit radiation. The hotter the object is the more radiation it is emitting at any given time. |
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