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| physical phenomena > process > physical process > motion > harmonic motion | 
| harmonic motion comparison table | |||||||||
| Subject | has dimension | has amplitude | has base unit | has unit | has definition | has value | has propagation direction | has parameter | has period | 
|---|---|---|---|---|---|---|---|---|---|
| elliptical orbit | 2 | equal to the semimajor axis | orbital element | proportional to the orbital period | |||||
| five-minute oscillations | length per unit time | Vertical oscillations of the solar atmosphere with a well-defined period of 5 minutes. | |||||||
| wave | Propagation of energy by means of coherent vibration. | 
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