a simple compass can be made by placing a small bar magnet on a cork floating in water. (the bar magnet is made of iron.) (a) what fraction of a plain cork will be submerged when floating in water? (b) if the cork has a mass of 13.5 g and a 25.0 g magnet is placed on it, what fraction of the cork will be submerged? (c) will the bar magnet and cork float in ethyl alcohol? yes no