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Israel936
Assuming you are on Earth, where acceleration due to gravity is 9.81 meters/second^2, and you have a pendulum with a cord that is 0.65 meters long, what is the period? A. 1.6 B. 6.5 C. 9.8 D 3.4
http://upload.wikimedia.org/math/5/a/a/5aa04824df4e09c1ae352502bdee9c92.png formula! and a wiki
2*pi*sqrt(L/g) L is length and g is gravity
A 1.61 when you plug in your formula