Memory.com™ is an online application and educational tool designed for studying, learning and revision. Memory is not a game and is not available offline or associated with any other company.
Memory is originally based on the Supermemo SM-2 spaced repetition Algorithm.
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Bushong Penguins

Electrons that flow in only one directions constitute ___; electrons that flow alternately in opposite directions constitute ___.

DC;AC

Author

Electrons that flow in only one directions constitute _; electrons that flow alternately in opposite directions constitute _.