1. Cenozoic ERA
2. Mesozoic ERA
3. Paleozoic ERA
Answer:
Explanation:
pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.
Answer:
the right answer is density of metal v1.v2