Rejuvenation

摘要

"So, can anyone tell me about the Hoffman vortex?"rnMr Murphy looked expectantly at his small A-level physics class as some clusters of excited murmuring broke out.rn"Conferring is allowed," he chuckled. "Catherine, Rebecca, come on! Tell me what you think before these rowdy boys beat you to it!"rnLooking at her and grinning, Rebecca nudged Catherine, urging her to speak first.rn"Well," Catherine began hesitantly, as the boys looked up, curiously. "Discovered by the physicist, Hans Hoffman, it was found that when two rings of a specific diameter and thickness of the radioactive element zylerium are counter-rotated at a specific rate about the same axis, at a specific distance apart, a vortex of zyleron particles is produced between the two rings."