Atomic hydrogen is allowed to combine on the surface to be welded to generate the temperature of...

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Atomic hydrogen is allowed to combine on the surface to be welded to generate the temperature of
(a) \( 400 \mathrm{~K} \)
(b) \( 3000 \mathrm{~K} \)
- (c) \( 4600 \mathrm{~K} \)
(d) \( 4000 \mathrm{~K} \)
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