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Thursday, October 3, 2019
उष्मागतिकी के प्रथम नियम से संरक्षित होता है ?
(A) संवेग
(B) ऊर्जा और संवेग दोनों
(C) ऊर्जा
(D) इनमें से कोई नहीं
Ans- C
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