Relaxin' with Ruff - S1.E17 - Fetch! with Ruff Ruffman
Ruff decides to calm down from the stresses of running a show. The kids learn to relax with yoga and to calculate heart rate (pulses in 15 sec * 4). Next, they mathematically measure their "fear factor" at Canobie Lake Park, an amusement park in New Hampshire.
Relaxin' with Ruff - S1.E17 - Fetch! with Ruff Ruffman
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