Gears were invented to make working easier.
They weren't 'invented' - a gear ratio is simply the difference in the number of teeth on two connected gear wheels.
Jacques Cousteau is credited for and I believe invented the modern SCUBA gear for diving, making diving a sport accessible to many.
Nobody knows. There were gears thousands of years ago.
There is a picture of a gear in the related link. a gear tooth is one of the things on the outside of the gear that sticks out. This gear has 18 teeth.
Reverse gear
The watchmakerOnésiphore Pecqueur invented the differential gear.
They weren't 'invented' - a gear ratio is simply the difference in the number of teeth on two connected gear wheels.
1234
old top gear was made in the 70s but modern top gear was invented in 2002
hentry ford
Scuba was invented by the navy.
2002? i think
Blaise Pascal Blaise Pascal
ya mam
Both it was Jacques Cousteau and Emile Gagnan who invented the modern scuba gear in 1942.
2005. it was awarded "car of the decade" on the show Top Gear!
Neil Bershetti... i don't know the date though...