The average density of Earth is 5,515 kg/m3. Since the average density of surface material is only around 3,000 kg/m 3, we must conclude that denser materials exist within Earth's core.
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Flagstar Mortgage Address. The address of Flagstar Mortgage is 5151 Corporate Drive, TROY, Michigan, 48098-2639, United States. The postal and official address, email address and phone number (helpline) of Flagstar Mortgage Service Center and Flagstar Mortgage customer service number is given below. The helpline of Flagstar Mortgage customer service number may or may not be toll free.