It is 10^4 times the intensity at 0 db

Assuming vertical acceleration of
, the speed after x seconds of falling is 
Answer - corona, chromosphere, photosphere
We cannot answer the question if we do not have the answers - sorry!!
Total amount of energy would remain constant according to law of conservation of energy. i.e., 50 Joules
In short, Your Answer would be Option C) <span>50 Joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion.
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Hope this helps!