A friend tells you he witnessed books and other objects falling off his bookcase during an earthquake. What was the magnitude of this earthquake

What statistics are to determine the development of a nation?

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

What is the bill of rights listed in, order