Two physical explanations have been given for the increased stability of high multiplicity states.

There is a physical explanation for its energy function.

"We don't know what the physical explanation is," said he.

He was committed to purely physical explanations of disease processes.

Last night, Brown said he believed that there was a physical explanation for his subpar performance.

I can only wonder at their either of them being content with such simple physical explanations.

"The reason you come up with such an idea is that you don't have a good physical explanation for it."

Science is the name we give to the practice of finding physical explanations about the universe.

Pain is reported as more distressing than it should be if there was a physical explanation.

Sleep problems sometimes appear out of nowhere, with no obvious physical or emotional explanation.