railway RRB Technician Grade 1 Mock Test 2024 General Science Physics Work Power Energy

एक अर्ग (erg) ________ ग्राम कैलोरी के बराबर है।

1
4.2 × 107
2
2.4 × 107
3
4.2 × 10-8
4
2.4 × 10-8
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