Electromagnetic force has an infinite range of interaction. It is considerably stronger than the gravitational and weak forces. The photon is the key particle of exchange for electromagnetic force. The Strong Nuclear Force The strong nuclear force operates over a very short range, but it is the strongest of the forces.
Thomas Holmes and Richard Rahe are 2 now famous psychiatrists who, in 1967, put forward the idea that there may be a link to stress and physical illness.
This article looks at the Holmes and Rahe Stress Scale, and explains how you can use it to manage the stress in your life. In 1967, psychiatrists Thomas Holmes and Richard Rahe decided to study whether or not stress contributes to illness.