• Question: Hi sir, I'am Jewel and I would like to know why it would affect the surroundings if a pebble was dropped on water? Thankyou.

    Asked by JJ to Frank on 15 Mar 2015.
    • Photo: Frank Longford

      Frank Longford answered on 15 Mar 2015:

      When a pebble drops on the surface of water it disturbs the water molecules that it lands on, forcing them to be pushed away from it. This creates a wave on the surface since all water molecules are connected to each other through strong inter-molecular bonds called “hydrogen bonds”. You can imagine these bonds as springs between molecules. Therefore if one moves, it pulls and pushes the others around it. Overall a kind of “mexican wave” is performed which spreads in all directions, causing the ripples in the water’s surface.