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SSS 2010-09-17

时间:2010-10-08 05:56来源:互联网 提供网友:xn0006   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?

Baseball players sometimes cheat! One popular method has been to cork1 the bat. You drill out some of the core of the bat, and replace the heavy wood with light cork. You can then swing the lighter2 bat faster, and thus hit the ball further.

Of course, most ballplayers aren't physicists3, so they don't realize that by making the bat lighter, they're reducing the collision efficiency. You swing faster, but get a limper contact. In theory, anyway.

So physicists led by the University of Illinois’s Alan Nathan tested corked4 bats under controlled conditions. The doctored lumber5 actually usually causes the ball to go less far, they found. The work appears in the online forum6 the Physics arXiv. So for a power hitter to cork his bat is a bad idea.

But the researchers note that, ironically, a corked bat might result in more homers from non-homer hitters. Who can watch a pitch slightly longer before swinging, make up for the lost time with a faster swing and achieve more solid contact more often. So a corked bat is a bad idea for Sammy Sosa, who got caught using one. But a good idea for, say, Bucky Dent7.

Thanks for the minute. For Scientific American's 60-Second Science. I'm Steve Mirsky.
 


点击收听单词发音收听单词发音  

1 cork VoPzp     
n.软木,软木塞
参考例句:
  • We heard the pop of a cork.我们听见瓶塞砰的一声打开。
  • Cork is a very buoyant material.软木是极易浮起的材料。
2 lighter 5pPzPR     
n.打火机,点火器;驳船;v.用驳船运送;light的比较级
参考例句:
  • The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一些。
  • The lighter works off the car battery.引燃器利用汽车蓄电池打火。
3 physicists 18316b43c980524885c1a898ed1528b1     
物理学家( physicist的名词复数 )
参考例句:
  • For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说,这是受挫折的一年。 来自英汉非文学 - 科技
  • Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。
4 corked 5b3254ed89f9ef75591adeb6077299c0     
adj.带木塞气味的,塞着瓶塞的v.用瓶塞塞住( cork的过去式 )
参考例句:
  • Our army completely surrounded and corked up the enemy stronghold. 我军把敌人的堡垒完全包围并封锁起来。 来自《简明英汉词典》
  • He kept his emotions corked up inside him. 他把感情深藏于内心。 来自《简明英汉词典》
5 lumber a8Jz6     
n.木材,木料;v.以破旧东西堆满;伐木;笨重移动
参考例句:
  • The truck was sent to carry lumber.卡车被派出去运木材。
  • They slapped together a cabin out of old lumber.他们利用旧木料草草地盖起了一间小屋。
6 forum cilx0     
n.论坛,讨论会
参考例句:
  • They're holding a forum on new ways of teaching history.他们正在举行历史教学讨论会。
  • The organisation would provide a forum where problems could be discussed.这个组织将提供一个可以讨论问题的平台。
7 dent Bmcz9     
n.凹痕,凹坑;初步进展
参考例句:
  • I don't know how it came about but I've got a dent in the rear of my car.我不知道是怎么回事,但我的汽车后部有了一个凹痕。
  • That dent is not big enough to be worth hammering out.那个凹陷不大,用不着把它锤平。
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