Floating Golf Ball

Golf balls normally sink in water. Not this one. Any idea why?

It turns out that salty water has more density than fresh water. This can be observed in the Dead Sea, where swimmers have more buoyancy and don’t need to work at all to stay afloat. So there is nothing special about this Golf Ball at all, but the water instead.

Our class added enough salt to recreate the conditions of the Dead Sea as best we could. We added 3000 g of salt to 12 L of water for a concentration of 250 g/L. By comparison, seawater only has a concentration of 35 g/L.