The Radius of the Earth Is Approximately 6370 Km $\pi$ R³

question 143

Multiple Choice

The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the outermost 2890 km (the crust and the mantle) has an average density of about 4.5 g/cm³. Farther down is the core. If the average density of the Earth is 5.5 g/cm³, what is the average density of the Earth's core? (Recall that the volume of a sphere is given by V = (4/3) $\pi$ r³.)

• A)11.g/cm³
• B)57.g/cm³
• C)6.2 g/cm³
• D)1.9 g/cm³
• E)not enough data is provided

---

Definitions:

Syringe Barrel

A component of a syringe that holds the fluid to be injected or drawn up, typically calibrated for measuring doses.

Nitroglycerin

A medication commonly used to prevent and treat chest pain caused by heart disease by widening blood vessels.

Morphine Sulphate

A powerful opioid analgesic used to relieve severe pain by acting directly on the central nervous system.

Sublingual Tablet

A medication form designed to be dissolved under the tongue for rapid absorption into the bloodstream.