标题: 《Periodic Table Neodymium 》作者：- Michael Swanwick【EPUB】 [打印本页] 作者: zaq 时间: 2013-8-20 09:53 标题: 《Periodic Table Neodymium 》作者：- Michael Swanwick【EPUB】 Michael Swanwicks Periodic Table of Science Fiction 60 Nd Neodymium144.24 Retirement Day Dja ever play with neodymium magnets the maglev engineer asked. He was the first man everto float a magnetic-levitation train from New York to LA many decades ago and this was hislast run. No the reporter said. The train made a faint humming sound as it shot frictionless along thetranscontinental monorail at fabulous speeds. He was doing a human-interest story on theengineers last time at the controls. Should I The engineer laughed. Best wear goggles if you do Theyre powerful stuff. Two magnets can flytogether with so much force they shatter into little shards. I used to play with ‘em when Iwas a kid. I was big into science then. Wanted to be an astronaut. That so Its how I ended up with this jobat the time I figured it was the next best thing. Anywayits the neodymium magnets that levitate the train. I thought it was the electromagnetic generator did that. Naw it provides the motive force. The train is kept off the tracks by fixed magnets. Arrangedin C-clamp configurations to either side of the rail so we dont fly off. The levitation isessentially