physical change

Examples of physical change in the following topics:

• Physical and Chemical Changes to Matter

  • There are two types of change in matter: physical change and chemical change.
  • There are two types of change in matter: physical change and chemical change.
  • As the names suggest, a physical change affects a substance's physical properties, and a chemical change affects its chemical properties.
  • They are also physical changes because they do not change the nature of the substance.
  • The formation of gas bubbles is often the result of a chemical change (except in the case of boiling, which is a physical change).

• Physical Development in Adulthood

  • As individuals move through early and middle adulthood, a variety of physical changes take place in the body.
  • As we age, our bodies change in physical ways.
  • Each person experiences age-related changes based on many factors: biological factors such as molecular and cellular changes are called primary aging, while aging that occurs due to controllable factors, such as lack of physical exercise and poor diet, is called secondary aging.
  • Around the age of 30, many changes begin to occur in different parts of the body.
  • Review the milestones of physical development in early and middle adulthood

• Physical Development in Adolescence

  • Puberty is the period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity.
  • Females tend to attain reproductive maturity about four years after the first physical changes of puberty appear.
  • While the sequence of physical changes in puberty is predictable, the onset and pace of puberty vary widely.
  • These changes are largely influenced by hormonal activity.
  • Hormones play an organizational role (priming the body to behave in a certain way once puberty begins) and an activational role (triggering certain behavioral and physical changes).

• Mass

  • In theoretical physics, a mass generation mechanism is a theory which attempts to explain the origin of mass from the most fundamental laws of physics.
  • All elements have physical properties whose values can help describe an elements physical state.
  • Changes to these properties can describe elemental transformations.
  • Physical properties do not change the chemical nature of matter.
  • Mass is an intrinsic property that never changes.

• Physical and Chemical Properties of Matter

  • Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity.
  • For example, the freezing point of a substance is a physical property: when water freezes, it's still water (H2O)—it's just in a different physical state.
  • Physical properties are properties that can be measured or observed without changing the chemical nature of the substance.
  • Some examples of physical properties are:
  • Hydrolysis and oxidation are two such reactions and are both chemical changes.

• Centripetial Acceleration

  • As mentioned in previous sections on kinematics, any change in velocity is given by an acceleration.
  • Often the changes in velocity are changes in magnitude.
  • When an object speeds up or slows down this is a change in the objects velocity.
  • However, the direction is constantly changing as the object traverses the circle.
  • A brief overview of centripetal acceleration for high school physics students.

• The Physical Pendulum

  • A change in shape, size, or mass distribution will change the moment of inertia.
  • This, in turn, will change the period.
  • As with a simple pendulum, a physical pendulum can be used to measure g.
  • A brief introduction to pendulums (both ideal and physical) for calculus-based physics students from the standpoint of simple harmonic motion.
  • This is another example of a physical pendulum.

• Overview of Non-Uniform Circular Motion

  • Note especially the change in the velocity vector sizes, denoting change in the magnitude of velocity.
  • The change in speed has implications for radial (centripetal) acceleration.
  • A change in $v$ will change the magnitude of radial acceleration.
  • The circular motion adjusts its radius in response to changes in speed.
  • The important thing to note here is that, although change in speed of the particle affects radial acceleration, the change in speed is not affected by radial or centripetal force.

• Angular Acceleration, Alpha

  • Angular acceleration is the rate of change of angular velocity.
  • In all these cases, there is an angular acceleration in which $\omega$ changes.
  • The faster the change occurs, the greater the angular acceleration.
  • Angular acceleration is defined as the rate of change of angular velocity.
  • where $\Delta \omega$ is the change in angular velocity and $\Delta t$ is the change in time.

• Aggregate Production

  • The production function relates the physical outputs of production to the physical inputs or factors of production.
  • Aggregate production functions create an estimated framework to determine how much of an economy's growth is related to changes in capital or changes in technology.
  • The average physical product is at its maximum.
  • Stage 2: output increases at a decreasing rate and the average and marginal physical product are declining.
  • The long-run growth of a firm can change the scale of operations by adjusting the level of inputs that are fixed in the short-run, which shifts the production function upward as plotted against the variable input.