OR. The general formula for the conservation of energy in a closed system can be expressed as: E total =constant. For mechanical systems, this can be written as: K+U=constant ...

The law of conservation of mass states that mass can neither be created nor destroyed. Interestingly, numerous ancient philosophers observed the knack for chemical and physical reactions to simply ...

WITH reference to the letter from Mr. Sommerville in your present issue, may I state that, in the discussion at the Belfast Meeting of the British Association, I pointed out that the height in the ...

The K-Pg extinction is the most recent of five events in Earth’s history that scientists consider mass extinctions, defined by paleontologists as events where more than 75 percent of species vanish ...