Which is a mixture that can be separated most efficiently by the size of its parts? a. salt water b. drawer of office supplies c. cooked noodles and water d. oil and vinegar salad dressing

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?