一個很難去回答的科學問題

oscar

地球的總質量是否不斷增加？(不計由太空來的物件)
Is the mass of the Earth increasing except the matters come from the space?

q9q9hkpokemon

不會增加的，
因為地球上的元素是固定的。
而且這個問題與生育率無關，
人只是吸收了食物中的化合物，
再把吸收了的化合物來令身體成長，
所以其中的質量不變。

幻藍

Originally posted by Echo21 at 2004-7-14 09:13 PM:
已合併帖子
不要再犯了[E-Hap]

有好多人都唔識一次過引用2篇文章
以致成日分post
必須正視此問題

Echo21

Originally posted by 可愛的兔兒 at 2004-7-14 21:00:
請不要分post!!!!! [E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang]

已合併帖子
不要再犯了[E-Hap]

幻藍

Originally posted by 潛 at 2004-7-14 08:44 PM:
呢個係物理上的問題，地理班唔識唔出奇

Originally posted by 潛 at 2004-7-14 08:45 PM:
現在討論緊地球問題

請不要分post!!!!! [E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang][E-Ang]

潛

Originally posted by yat at 2004-6-22 01:58 PM:
我家姐F.6都唔識....(佢讀地理)
唔知係佢廢定未教...

呢個係物理上的問題，地理班唔識唔出奇

Originally posted by smallpotato226 at 2004-6-23 10:46 AM:
其實這樣計的話,質量會很不穩定......
當前來說當然是增加中...(因為生育率比死亡率高<暫時>)
不過人口老化(D人愈來愈唔想生BB)卻會令質量減少...

以上純粹個人愚見,有不對的請原諒...

現在討論緊地球問題

[ Last edited by Echo21 on 2004-7-14 at 09:12 PM ]

冰見友樹

Originally posted by yat at  01:58 PM:
我家姐F.6都唔識....(佢讀地理)
唔知係佢廢定未教...

我覺得係物理問題..."

oscar

算啦...佢再嘈就即BAN!

Echo21

Originally posted by yat at 2004-6-25 12:59:
費時有人再係到嘈........
如果冇人答既話不如lock

只要沒有人再挑釁
就不會有罵戰
根本不需要lock
而且樓主的問題是有建設性的
不是說lock就隨便lock

yat

Originally posted by Echo21 at 25-6-2004 12:56:
請兩位不要吵
已警告了他了
就此算吧

費時有人再係到嘈........
如果冇人答既話不如lock