ame: Bryan
Status: student
Grade: other
Country: USA
Date: Fall 2013

Question:
What would the formula be to compute your latitude using a pendulum and timing how long it takes to knock down two pegs that are say 10 degrees apart?
Replies:
At the equator of Earth, the plane of the Foucault pendulum remains fixed relative to an observer on Earth. At the pole, the angular speed is 360 degrees per sidereal (NOT noon to noon) day. The angular rate is related to the sine function of the latitude.

The angular rate = (360) sin L/sidereal day, where L is the latitude in degrees.

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