A.\(f = \frac{1}{{2\pi }}\sqrt {\frac{g}{l}} \).
B.\(f = \frac{1}{{2\pi }}\sqrt {\frac{l}{g}} \).
C.\(f = \frac{1}{\pi }\sqrt {\frac{g}{l}} \).
D.\(f = \frac{1}{\pi }\sqrt {\frac{l}{g}} \).
Loga
Hóa Học lớp 12
