When you hang a weight on the end of a spring, the spring extends (lengthens). He found that the amount of the extension is proportional to the added weight. This is now called Hooke's Law.
Robert Hooke found out that springs once stretched to a certail level will after go back to its original shape.
just do Google on Robert hooke's inventions just do Google on Robert hooke's inventions
Robert hooke was 56 when he discovered cells
He get find with is family == ==
by finding out gravity
Robert Hooke
no, not really. but he did discover corkcells.
I think you will find he quite famous.
Robert Hooke used a compound light microscope to find cells. He found cells looking at cork and thought that they looked like cells.
He discovered cells in 1665.
You can find someone else to experiment...
Write an experiment to find the velocity of sound?