Water boils when the water vapour pressure is equal to the atmospheric pressure that is 100 degree centigrade and atmospheric pressure is 1. At vacuum, there is no pressure boiling should occur at low temperature only.
Definition of Public Health Nursing. Public health nursing is the practice of promoting and protecting the health of populations using knowledge from nursing, social, and public health sciences. Public health nursing is a systematic process by which: The health and health care needs of a population are assessed in order to identify subpopulations, families and individuals who would benefit from health promotion or who are at risk of illness, injury, disability or premature death.
The purpose of health promotion is to positively influence the health behavior of individuals and communities as well as the living and working conditions that influence their health. Health promotion improves the health status of individuals, families, communities, states, and the nation. 2  Health promotion enhances the quality of life for all people. 3  Health promotion reduces premature deaths.