請勿超越50
中將
黑C中女愛好者
12-4-2011 20:06
查看詳細資料
TOP
少尉
Just a member
二等兵
原帖由 Snowolf 於 12-4-2011 22:10 發表 rich of chemistry knowledge
少將
衛隊工程部
原帖由 tango1997 於 12-4-2011 23:49 發表 小弟智識有限,除左鉄還有什麽物質對磁石有反應? 另還想請教磁石本身係乜野物質?thank you c hing
原帖由 sam524 於 13-4-2011 00:06 發表 其實磁石可以用大部份金屬做...如銅/鐵 但要先做手腳磁化佢...
士官長
原帖由 rexcheung 於 13-4-2011 01:58 發表 用電線'橋'位碌金屬果種,叫電磁鐵,要通電先有磁力。例:廢車場吊車果舊金屬。
國務卿(鐵腳H)
總版主
BAN屎豪
原帖由 Elf 於 12-4-2011 20:15 發表 any ferromagnetic material will exhibit such pheonomenal, and not only iron will do that, but also nickel and cobalt. the can is not made entirely from aluminium, but aluminium alloy, which probably i ...
紙上談兵
原帖由 Hkpolice-Psu 於 15-4-2011 10:29 發表 entirely from aluminium will be very expensive. and i've discover somehow there have some bottom of softdrink can are much harder than others.
原帖由 nishi 於 15-4-2011 10:37 發表 seems Nestea's can is much harder than the one of Pepsi... my gun cannot break the bottom of the Nestea can but can pierce the Pepsi can's bottom easily...
原帖由 Hkpolice-Psu 於 15-4-2011 10:41 發表 not only that kinds of different, i am talking about between the normal coke,fanta and zero coke etc. the same product under the swire, but different can.
原帖由 tango1997 於 14-4-2011 21:38 發表 師兄可能誤會左 小弟講個一個"橋"住鉄棒通電,另鉄棒自身磁化,好似教育電視科學科造個一個實驗咁樣 師兄你講個一種小弟都知道,就好似在大工字鉄鑽窿個一種流動鑽床,底 ...