A nail is attracted to a magnet. What does this tell you about the nail?
O
A. It is harder than the magnet.
O
B. It is a poor thermal conductor.
O
C. It contains iron.
O
D. It is a good electrical conductor.

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?