Question

Why do beads of water often form on a slippery surface, such as a freshly waxes car?

Answer 1

the waxy surface is hydrophobic, which mean it repels water molecules,

the water it self is a polar molecule and therefore, water molecule are attracted to other water molecules,

as a result the water on the waxy car like to group together in beads

Answer 2

a similar phenomena is observed when oil (highly hydrophobic) is present on the surface of water

this time the oil forms the bead shapes

Answer 3

Thanks