Why do you think Democritus is credited with developing the idea of atoms instead of Acharya Kanad? (This response does not need to have specific evidence to support it, but you are welcome to seek outside sources to provide some if it interests you.)

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?