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nevsk [136]
3 years ago
7

What generalization can be made about energy?

Physics
2 answers:
Lilit [14]3 years ago
8 0

you cannot create energy nor destroy it

HACTEHA [7]3 years ago
6 0
Well, energy can be produced from the burning of fossil fuels which produce steam to spin turbines which generates electricity. But fossil fuels like coal and oil are no renewable.
Some renewable ways to get energy is water where they separate hydrogen from h2o because hydrogen can be made into energy. Also nuclear fission is another way to get energy. That's when in a nuclear power plant, the atoms nucleus is split which sends a large amount of energy.
Wind energy is another source of energy, which is from windmills. Another renewable energy source is solar energy. That's when u use solar cells, like some houses and calculators have, which generates a lot of energy, but only in the day since the sun doesn't shine in the nigh.


Hope I helped!!!

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 <span>The maximum possible efficiency, i.e the efficiency of a Carnot engine , is give by the ratio of the absolute temperatures of hot and cold reservoir. 
η_max = 1 - (T_c/T_h) 

For this engine: 
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The actual efficiency of the engine is 30%, i.e. 
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On the other hand thermal efficiency is defined as the ratio of work done to the amount of heat absorbed from hot reservoir: 
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So the heat required from hot reservoir is: 
Q_h = W/η = 1000J / 0.20 = 5000J</span>
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