How does rust serve as a preservative?

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Which element is the least metallic between cadmium, silver, zinc, or iron?

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.