Dose the equator cross the northern or southern part of south america

"water seeps into rock cracks and dissolved minerals there. the solution travels through cracks in the. eventually concentrating into large crystals." which process is that

What is the full meaning of rfid on computer

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