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回復 400# 抽刀斷水
進化
回復 401# dye


    我少讀書, 你唔好呃我, 進化會係同一個人同一代進行既咩?
本帖最後由 dye 於 2010/12/1 17:15 編輯

你無聽過CANCER都係進化出黎咩?

http://evolution.berkeley.edu/evolibrary/news/071001_cancer

在教徒頭中出現突變,再配合適當環境………
回復 400# 抽刀斷水

本來冇,若果持續冇則不會離教。但突然生出來就會突然離教、漸漸生出來就會漸漸離教
算你們狠。
支持鼓勵每位離教者 › 閹割神父 刻不容緩 ‹
點解風有時可將火愈吹愈大,但有時火又會被風吹熄呢?
Don't know where God is but the Devil is in the details
愈吹愈大係由於吹進新鮮氧氣助燃,吹熄係因為降低至若干溫度而無法繼續燃燒。
支持鼓勵每位離教者 › 閹割神父 刻不容緩 ‹
回復 407# 抽刀斷水

咁降到幾多度會燒唔著?
唔同物質有唔同既ignition point既喎:
http://en.wikipedia.org/wiki/Ignition_point
支持鼓勵每位離教者 › 閹割神父 刻不容緩 ‹
好似唔係喎大佬
我劃著枝火柴,一吹就熄
但係,我找到個仔支探熱針,吹到我虛脫都降唔到1° F
Don't know where God is but the Devil is in the details
你去吹溫度計先得,探熱針功能是用來記錄最高溫度,只有在fing的過程才會把溫度記錄下降。
支持鼓勵每位離教者 › 閹割神父 刻不容緩 ‹
都試過,唔得喎。一係您下個星期帶個溫度計吹俾我睇下
Don't know where God is but the Devil is in the details
回復 412# 沙文


    兩支溫度計先放在熱水中,一支你狂吹,一支放係度唔理,睇下邊支快D降溫咪知囉。

我就無探熱針、溫度計,我地D先進家庭,梗係用高科技野啦:
我頭先又試過,我懷疑您的解釋同創世紀的性質一樣。

我在 -13° C温度之中點火柴,都點得著。您點吹,都吹唔到支温度計低過-13°卦?
Don't know where God is but the Devil is in the details
氣溫 -13° C姐,但係點火柴既過程,藉由火柴頭的火藥磨擦,火柴頭包含火藥和磷,磷的燃點很低,磨擦就足以起火,磷燃燒後會燒著火藥,再把火柴木枝升溫,那部分就再不是 -13° C了。

自己睇下,無點你:
http://en.wikipedia.org/wiki/Match
支持鼓勵每位離教者 › 閹割神父 刻不容緩 ‹
本帖最後由 豬丫痾腎 於 2011/2/12 10:40 編輯

或者咁講,吹得熄係因為熱既空氣粒子被吹散左,而唔係直接降低粒子既溫度。
溫度計係固體冇得被風吹散。
回復 415# 抽刀斷水

燒完磷之後就燒木。我等佢燒木時吹熄佢,您話我聽木嘅ignition point係幾多嘞
回復 417# 沙文


    咁易咩,要做論文架:
http://iafss.haifire.com/html/ao ... abstracts/1-380.htm

仲有,係磷燒火藥,火藥燒木先真。
回復 418# 抽刀斷水

我依然覺得您好似我依然覺得您好似


我試過用風筒熱風吹火柴都吹得熄
附件: 您需要登錄才可以下載或查看附件。沒有帳號?新建帳戶
Don't know where God is but the Devil is in the details
This is dye at your service.

I am not perfectly certain but here is what I think:

1) Fire burns better under breeze because it brings in oxygen and carries the carbon dioxide away.

2) In a strong wind, the negative pressure create a vaccum sucking both oxygen as much as carbon away.  (To have wind blowing, you create a low pressure zone around/near the fire.)

It has nothing to with temperature, although temperature is an intial require condition for the ignition.  

(Notice how ignition is different from the process of burning.  It is NOT ignition that Sherman is asking, it is burning.  If the fire is already burning, is the flow of air enough to carry so much heat away to below the ignition point?)
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