How long does it take to get my hands clean with a bar of soap?

From a bacterial standpoint, it takes about twenty seconds for the germs and dirt to be picked up and washed away.

Then there’s the case of why Ivory soap floats.

Ivory soap floats because of air. They whip the soap, allowing air pockets to get into the mixture before it solidifies.

As with a flotation device in a swimming pool, the air is what makes the soap buoyant.