Definition of Environmental Health. Environmental health is the science and practice of preventing human injury and illness and promoting well-being by identifying and evaluating environmental sources and hazardous agents and
It turns out that an objectâs kinetic energy increases as the square of its speed. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.Thus a modest increase in speed can cause a large increase in kinetic energy.These ideas are combined in the equation for kinetic energy. In words: Kinetic energy equals the mass of the moving object times the square of that objectâs speed (v 2).hus a modest increase in speed can cause a large increase in kinetic energy. These ideas are combined in the equation for kinetic energy. In words: Kinetic energy equals the mass of the moving object times the square of that objectâs speed (v 2).
Increases in the temperature of a system results from increases in the kinetic energy of the system. This has several effects on the rates of reactions. 1) More energetic collisions. When molecules collide, the kinetic energy of the molecules can be converted into chemical potential energy of the molecules.If the chemical potential energy of the molecules become great enough, the activation energy of a exergonic reaction can be achieved and a change in chemical state will result.) The number of collisions per unit time will increase. In order to convert substrate into product, enzymes must collide with and bind to the substrate at the active site. Increasing the temperature of a system will increase the number of collisions of enzyne and substrate per unit time.