Can we help him to reach this message to a million children? drop a

The amount of work performed to break a spherical drop of radius 1 mm into million drops of equal radius , is

If a million tiny droplets of water of the same radius coalesce into one larger drop, the ration of the surface energy of the large drop to the total surface energy of all the droplets will be

Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?