A body freely falling under the action of gravity passes two points 10m apart vertically In 0.25. From what height, above the higher point did it starts to fall

The unique property of it is that nanotechnology deals with atomic, or rather molecular scales, as opposed to micro-technology which deals with mechanical and electrical devices. In addition, nanoscale is one-third of microscale. It deals with the very small and tiny particles that our naked eye cannot see.