# L[cm] T[s]
30.0 1.1444
40.0 1.3088
50.0 1.4545
60.0 1.5868
70.0 1.7090
80.0 1.8232
90.0 1.9303
100.0 2.0323
110.0 2.1290
120.0 2.2214
130.0 2.3107
140.0 2.3959