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<p>still plays important practical and theoretical roles in modern science. For example, engineers of power plant systems work to minimize losses at different stages of converting energy sources (e.g. fossil fuels, sunlight, or wind) into usable electrical energy.</p>

<p><big> Thermodynamics of energy transformation </big></p>
<p>According to the <a href="page.php?w=first_law_of_thermodynamics">first law of thermodynamics</a>, energy can never be created or destroyed from an <a href="page.php?w=Thermodynamic_system">isolated system</a>, but it can move</p><p>
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