點樣浮起舊金屬呢??

好易姐係金屬下面係放水銀就得
如果你係話浮係空中只要將兩舊磁石放係你舊金屬ｇｅ同等相距距離就得

increase the desity of the liquid (eg add alot of salt to water can increase the desity of water and that can cause a copper coin flow on top of the water)