why does soap make water less buoyant (dense)?

Subject: why does soap make water less buoyant (dense)?

Date: Sat May 12 22:39:05 2001
Posted by mike foster
Grade level: 4-6 School: merango elementry
City: galt State/Province: ca Country: usa
Area of science: Earth Sciences
ID: 989721545.Es

Message:


i did a buoyancy test on tap water, salt water, baking soda water, and soappy 
water.  the soappy water ended up being less buoyant than tap water.  I used 
cents in a cut out plastic dixi cup to measure the buoyancies and it took less 
cents to sink the dixi cup in soappy water than in tap water.

Re: why does soap make water less buoyant (dense)?

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