Question: A Foucault pendulum consists of a brass sphere with a diameter of 35.0cm suspended from a steel cable 10.5 m long (both measurements made at

A Foucault pendulum consists of a brass sphere with a diameter of 35.0cm suspended from a steel cable 10.5 m long (both measurements made at 20.0°C). Due to a design over sight, the swinging sphere clears the floor by a distance of only 2.00 mm when the temperature is 20.0°C. At what \temperature will the sphere begin to brush the floor?

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