revised from <a href="//commons.wikimedia.org/wiki/File:ActivationEnergyInt.svg" title="File:ActivationEnergyInt.svg">Image:ActivationEnergyInt.svg</a>
webridge
<a href="//commons.wikimedia.org/wiki/File:ActivationEnergyInt.svg" title="File:ActivationEnergyInt.svg">Image:ActivationEnergyInt.svg</a>