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.
So what are the top ten stressful life events on the Holmes and Rahe scale, and how are they used to predict the likelihood of illness? Each event is assigned a âLife Change Unitâ score. These are then added together over a year and used to predict illness. For adults, the top ten most stressful events and their âLife Change Unitâ scores are as follows: Death of a spouse: 100.