While quantum mechanics primarily applies to the smaller atomic regimes of matter and energy, some systems exhibit quantum mechanical effects on a large scale. (en.wikipedia.org)
This film is easily disrupted by the simple mechanical effect of brushing the teeth. (avdc.org)
The same researchers who pioneered the use of a quantum mechanical effect to convert heat into electricity have figured out how to make their technique work in a form more suitable to industry. (thescienceexplorer.com)