Why will a magnet attract an ordinary nail or paper clips but not a wooden pencil?
physics - Jim, Saturday, December 8, 2007 at 12:56pm
A magnet can only attract objects that are made of "ferromagnetic" materials (such as iron). A pencil is not made of ferromagnetic material and hence is not attracted to a magnet.
physics - sam, Thursday, May 8, 2008 at 9:26pm
The atomic mass number of an element is the same as the number of its ?