A Planet Is Made of Two Distinct Materials

question 69

Multiple Choice

A planet is made of two distinct materials. From the core to R/2, the density of the material is 4000 kg/m3, and from R/2 to R the density is 3000 kg/m3. What is the gravity at the surface of the planet if R = 5000 km?

• A) 0.699 m/s²
• B) 3.66 m/s²
• C) 4.19 m/s²
• D) 4.38 m/s²
• E) 4.99 m/s²

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Definitions:

Pulse Pressure

The difference between systolic and diastolic blood pressure, indicating the force that the heart generates each time it contracts.

Ejection Phase

This is the part of the cardiac cycle during which the ventricles contract and pump blood out into the arteries.

Left Ventricle

The heart's compartment that takes in blood rich in oxygen from the left atrium and then pushes it through the aorta to circulate around the body.

Pulmonary Trunk

A major blood vessel of the human heart that originates from the right ventricle and splits into the left and right pulmonary arteries, which transport deoxygenated blood to the lungs.