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v. t. e. In continuum mechanics, stress is a physical quantity that describes forces present during deformation. For example, an object being pulled apart, such as a stretched elastic band, is subject to tensile stress and may undergo elongation. An object being pushed together, such as a crumpled sponge, is subject to compressive stress and ...
Elastic energy is the mechanical potential energy stored in the configuration of a material or physical system as it is subjected to elastic deformation by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally deformed in any manner. Elasticity theory primarily develops formalisms for ...
In psychology, stress is a feeling of emotional strain and pressure. [1] Stress is a type of psychological pain. Small amounts of stress may be beneficial, as it can improve athletic performance, motivation and reaction to the environment. Excessive amounts of stress, however, can increase the risk of strokes, heart attacks, ulcers, and mental ...
There is no doubt that stress is a part of everyday life, but too much can have detrimental impacts on people’s physical and mental health. What people should know about stress, according to a ...
The idea that stress is stored in specific parts of the body likely comes from Sigmund Freud’s work more than 100 years ago. “There was this idea that when people repress or deny their ...
The life expectancy among adults was much higher; [285] a 21-year-old man in medieval England, for example, could expect to live to the age of 64. [286] [285] However, in various places and eras, life expectancy was noticeably lower. For example, monks often died in their 20s or 30s. [287]
Intergroup anxiety. Intergroup anxiety is the social phenomenon identified by Walter and Cookie Stephan in 1985 that describes the ambiguous feelings of discomfort or anxiety when interacting with members of other groups. Such emotions also constitute intergroup anxiety when one is merely anticipating interaction with members of an outgroup. [1]
Positive psychology is a field of psychological theory and research of optimal human functioning of people, groups, and institutions. [1][2] It studies "positive subjective experience, positive individual traits, and positive institutions... it aims to improve quality of life." [3]