How would an increase in population impact an aquifer

Why might the new countries be interested in joining the european union (eu)?

How does the parallax of a nearby object compare to that of an object farther away?

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite