easy · Enhanced ACT science
A physicist hypothesizes that the period of a pendulum is determined solely by the length of the string and is independent of the bob's mass.
| Mass (g) | Length (cm) | Period (s) |
| :--- | :--- | :--- |
| 50 | 100 | 2.0 |
| 100 | 100 | 2.0 |
| 150 | 100 | 2.0 |
Which conclusion is best supported by these experimental results?
- The hypothesis is refuted because a constant period indicates that the pendulum is not functioning properly.
- The hypothesis is supported because the period remains constant across all trials despite changes in mass.
- The hypothesis is refuted because the experiment did not vary the length of the string to prove its influence.
- The hypothesis is supported because a mass of 150 g resulted in a stable period for the pendulum system.
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