王祥卧冰

2025-03-26 13:49:22
推荐回答(2个)
回答1:

据说,一个名叫王祥的人,曾经为了至母亲的重病,而跑到冰湖上脱个精光,融冰
捉鱼。
这就是所谓二十四孝或三十六孝里面的卧冰求鲤。

如果你念过国一公民(83年版),一定不会忘记谈孝道那一章的倒数第三页把哭
竹和这种事并列为「愚孝」。当然啦,包括我在内的大部分人都对公民这一科十分
不屑,若能报生母养育之恩,使母亲康复,哭出直肠或冰出冻疮也算值得,何愚之
有?之所谓「朝救母,夕可死已」但已经养成科学的头脑的我们在精密思量后,终
於解出了国立编译馆教授们对卧冰求鲤所谓的「愚」。
首先我们非常注重事实,一个会落到如此下场的人家一定不富有,绝对是家穷苦的
平常百姓,母子两人相依,劳动力恐怕还无法达到温饱,此人必是个瘦小的孩子。
再来了解关系以后,你应该不难想像当时温度之低:毕竟人可以随随便便拿著篮子
跑到湖中央,湖上结的冰一定要够厚才行,而这样一来当时气温绝对低於零下十度

那我们就保守猜测,当时冰只有十五公分厚,而气温是摄氏零下十度。一个被别人
看做白痴ㄉ小夥子跑到了湖中央,脱了上衣趴在冻死人的冰块上。我们再假设他为
了不要冻死自己,尽量避免不必要的直接与冰接触,所以只让自己的胸脯贴在湖面
上(当然,我办不到这个动作),而刚刚提到他并不很壮硕,所以只融出了一个直
径三十公分的圆。再来就是要精密正确了,关於这点,仁鸿隽先生非常的注重,甚
至教你告诉人家时间的时候还要报上秒数(有谁的表是真正准的呢?)。融掉的冰
底面积是半径十五公分的圆(应该不会是圆才对啦,不过挺接近了,何况算不规则
面积要用积分法,实在很麻烦),高也是十五公分,全部体积就是10603立方公分
,乘上0.92g/cm3的比重,就是9755克;冰的,比热是0.55cal/g°C,让它升高摄
氏十度到达熔点就要用53651卡的热量;再说冰的融化热是80cal/g,要让它从冰融
成水又要780372卡。这两个温度加在一起,即834023卡的热量,约为834大卡。
接著,健康教育课告诉我们,一个人的胸部大约占了全身表面积的百分之九。这个
数据原本是用来算烫伤面积的,不过在此也同样好用。这个人在冰冷的空气中暴露
著,除了那贴著冰的百分之九,其它百分之九十一的皮肤也同时在散发热量。因为
空气实在比体温低太多,所以照理说全身热量散失速率应该差不多;把他呼吸所需
能源忽略、保持那个只用胸部贴地姿势的奇怪姿势所需能源也忽略、思考以及其他
内脏活动所需能源全部都忽略…他还是会在融掉那块冰的同时,散发掉834/9*91大
卡的热量於空气中,所以整个过程下来,他这个人损失了足足9267大卡的热量,足
足是一人每天所需的三到四倍。
为了力求透彻,我们知道阿祥因为母亲在寒冬中生病,家里没钱粮食也不多,而且
古时候的人又没去学堂念健康教育,所以饮食绝对不可能照课本上所说的丰富均衡
, 9267大卡搞不好比他们母子两人四五天下来所能吃到的还要多;何况之后手都
冻僵,捉鱼的手续一定事倍功半,不知道又要另外消耗多少能源才能达到。若为了
此举而一口气吃光两人半个月的粮食,真的还不如去买条鱼回家算了。如此一来他
不但没有经济概念,而且没有环保概念,真是愚。
更力求透彻一点,一卡等於4.187焦耳,所以9267大卡就差不多是38800929焦耳,
如此能源可把五十公斤重之物一口气举到七十九公里的高空,或让五吨重的汽车开
到448 公里的时速……有这样变态的力量,随便就可以把整个湖的冰打成碎片了,
干麼还要让自己冻个半死呢?果然是愚孝。

回答2:

那个孩子疯了
你别信,那都是假的。

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