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A spring-mass-spring system with various masses was allowed to oscillate with no friction or gravity. This shows the period in seconds of the oscillations (second column) as a function of the mass in kg (first column). This experiment was conducted by David Harman and Mark Zerella, students at the University of Arizona.

1st col	2nd col
0.1256	0.9920
0.1758	1.1686
0.2549	1.4068
0.3051	1.5370
0.3549	1.6556
0.3805	1.7182
0.4307	1.8256
0.4805	1.9292
0.5105	1.9924
0.5607	2.0846