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A simple pendulum of mass m=2.00 kg and lenght L=0.82 m on planet X, where the value of g is unknown, oscillates with a period T=1.70 s. What is the period if the lenght is doubled?
a. 1.7 s
b. 3.4 s
c. 2.4 s
d. 0.85 s
e. 1.2 s