Physics · Thermodynamics
निम्नलिखित में से कौन सा कथन यह बताता है कि एक ऊष्मा इंजन केवल एक ही स्रोत के साथ ऊष्मा का आदान-प्रदान करके एक पूर्ण चक्र में शुद्ध कार्य उत्पन्न नहीं कर सकता है?
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