What did Percy do with Medusa’s double bagged head

Compare and contrast physical changes with chemical changes.

What type of electromagnetic radiation has a shorter wavelength than blue light

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?