Bob wants to demonstrate that the Earth is not perfectly spherical, so he takes a 1.0000 m long pendulum to Mumbai. Giving the pendulum a small displacement, he measures the period to be 2.0086 seconds. Then he takes the pendulum to Helsinki and measures the period to be 2.0051 seconds. Give answers to five sig figs.

a) Find the magnitude of the local gravitational acceleration in Mumbai. ___________

b) Find the magnitude of the local gravitational acceleration in Helsinki. ___________

c) Is Helsinki or Mumbai closer to the center of the Earth? Explain how you know.