Jawapan

2015-10-03T22:25:52+08:00
Plastic. this is because plastic is lighter than metal and wood :)
2015-10-06T16:03:06+08:00
This is not my answer, I found it on yahoo: Archimedes did this experiment many years ago. Different wood has different densities (oak is more dense than maple); different metals have different densities (lead is more dense than aluminum), etc. In general, from most dense to least dense: Metal, Glass, Plastic, Hands, and least dense, Wood.