speed Hierarchy

System: HEP

flowchart LR
    hep_speed["<b><a href="../../systems/hep/#speed" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">hep::speed</a></b><br><i>(<a href="../../systems/hep/#length" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">length</a> / <a href="../../systems/hep/#duration" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">duration</a>)</i>"]
    hep_velocity["<b><a href="../../systems/hep/#velocity" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">hep::velocity</a></b><br><i>(<a href="../../systems/hep/#displacement" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">displacement</a> / <a href="../../systems/hep/#duration" style="color: var(--md-mermaid-label-fg-color); text-decoration: none;">duration</a>)</i>"]
    hep_speed --- hep_velocity