The rusting of iron is not a physical property because A. the identity of iron remains unchanged
B. a new substance with new properties formed
C. iron is magnetic
D. it cannot be observed

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

What is the main reason why some developing countries fear the increase the free trade policies around the world?

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