While I continue to view the calorie - model of nutrition as overtly simplistic, there are some basic principles of physics at work here. (foodasmedicine.ca)
In a synthesis of social science and natural science, Ball examines the evolution of complex human systems — markets, cultures, governments, and the like — using principles of physics. (discovermagazine.com)
The best models will be based on well established principles of physics, chemistry and biology. (rabett.blogspot.ru)