13.For a simple pendulum with length L swinging back and forth through a small angle, under the influence of gravity with gravitational acceleration g, the angular frequency ω is approximately equal to
(A)
(B)
(C)
(D)
(E)
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統計: A(1), B(1), C(1), D(1), E(0) #3427013
統計: A(1), B(1), C(1), D(1), E(0) #3427013