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in Physics by (122k points)
एक कानों इंजन `627^(@)C` पर स्रोत से 3000 किलोकैलोरी ऊष्मा लेता है तथा सिंक को `27^(@)C` पर देता है। इंजन द्वारा कृत कार्य है :
( 1 किलोकेलोरी `= 4.2 xx 10^(3)` जूल )
A. `4.2 xx 10^(6)` जूल
B. `8.4 xx 10^(6)` जूल
C. `16.8 xx 10^(6)` जूल
D. शून्य ।

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