5: The average density of the earth is about 5515 kg/m³. The density of crude oil is considerably lower, leading to an observed density of the earth of about 5477 kg/m³ over a major oil deposit. What is the change in frequency for a 2.5 m pendulum swinging over an oil deposit compared to the frequency for the same pendulum swinging over "regular" earth.

5: The average density of the earth is about 5515 kg/m³. The density of crude oil is considerably lower, leading to an observed density of the earth of about 5477 kg/m³ over a major oil deposit. What is the change in frequency for a 2.5 m pendulum swinging over an oil deposit compared to the frequency for the same pendulum swinging over "regular" earth.