真空罐頭的問題!急!求今天內回答!!!!

由於真空罐頭入面無氣體，所以當內部壓力係0
換言之，罐頭所受嘅力就完全係由大氣壓力引致。

假設大氣壓力P=100kpa=100000
p=f/A
f=force a = surface area
咁就可以大概計到個真空罐頭受到幾多力

P*A=F ，如果F 唔夠力去整爆個罐，咁就無事。

Let take a tin of beef for example . The reason to take away all air to create a vacuum is to preserve the meat inside the tin . Since no air no bacteria inside so the tin food can be kept for a long time . If the metal of the tin is strong enough & inside is full of beef so no spaces , why the tin will be cracked .

becoz......
since I dunno , then bye!!~

你用罐頭兩字，係會令人認為係超市賣嘅罐裝食品，但如果係罐頭，就從未聽過有真空罐頭，你唔加上頭字就有啲意思，真空罐係有其事，無論係低壓或高壓，罐身設計都有共通點，就係圓桶形，而兩端成半球形狀，就係咁嘅設計抗壓能力較高，比較容易見到例子有石油氣罐，滅火桶，潛水氧氣樽，甚至潛水艇就係一樣。