______ is an energy form found in nature that has not been subjected to any human engineered conversion process. It is energy contained in raw fuels, and other forms of energy received as input to a system.
Primary energy
举一反三
- ______ is an energy form found in nature that has not been subjected to any human engineered conversion process. It is energy contained in raw fuels, and other forms of energy received as input to a system.( ) A: Premium energy B: Primary energy C: Principal energy D: Preliminary energy
- Energy conversion, which means the transformation of different energy forms, constitute the basic process of our energy usage.
- Human beings have been depending heavily on fossil fuels to meet their increasing energy demands since the Industrial Revolution.
- Electricity generation is the process of converting some form of energy ___ electricity.
- Electricity, like other forms of ______ has greatly increased in price. A: strength B: force C: power D: energy
内容
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In a constant volume process for a closed system, the internal energy change of the system depends on the heat exchanged.
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The energy conversion can take place _______.
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Energy conversion efficiency (η) is the ratio between （ ）and （ ）.
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Nature Energy hopes to serve as a forum for the spread and discussion of pressing energy questions.
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The production process of thermal power plant is to convert () of fuel into electric energy. A: chemical energy B: heat energy C: mechanical energy D: kinetic energy