Final answer:
The coordinating conjunction in the sentence is 'yet', which connects the adverbs 'powerfully' and 'slowly' in the sentence.
Step-by-step explanation:
The coordinating conjunction in the sentence is yet. A coordinating conjunction is a word that connects words, phrases, or clauses of equal importance in a sentence. In this case, the conjunction 'yet' connects the adverbs 'powerfully' and 'slowly' in the sentence. Coordinating conjunctions in English include 'and', 'but', 'or', 'nor', 'for', 'so', and 'yet'.
Learn more about Coordinating conjunctions