005 10.0 points A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower. The period of oscillation is 10.5 s. The acceleration of gravity is 9.8 m/s. What is the height of the tower? 1. 23.8407 2. 22.7348 3. 17.3077 4. 30.0367 5. 27.3681 6. 17.5573 7. 19.7956 8. 25.8266