conserved

Examples of conserved in the following topics:

• The Law of Conservation of Mass

  • The law of conservation of mass states that mass in an isolated system is neither created nor destroyed.
  • However, Antoine Lavoisier described the law of conservation of mass (or the principle of mass/matter conservation) as a fundamental principle of physics in 1789.
  • This law was later amended by Einstein in the law of conservation of mass-energy, which describes the fact that the total mass and energy in a system remain constant.
  • A portrait of Antoine Lavoisier, the scientist credited with the discovery of the law of conservation of mass.
  • This video explains how atoms are conserved in a chemical reaction.

• Conservation of Mechanical Energy

  • In any real situation, frictional forces and other non-conservative forces are always present, but in many cases their effects on the system are so small that the principle of conservation of mechanical energy can be used as a fair approximation.
  • Let us consider what form the work-energy theorem takes when only conservative forces are involved (leading us to the conservation of energy principle).
  • If only conservative forces act, then Wnet=Wc, where Wc is the total work done by all conservative forces.
  • This equation is a form of the work-energy theorem for conservative forces; it is known as the conservation of mechanical energy principle.
  • An example of a mechanical system: A satellite is orbiting the Earth only influenced by the conservative gravitational force and the mechanical energy is therefore conserved.

• Conservative and Nonconservative Forces

  • A conservative force is dependent only on the position of the object.
  • Gravity and spring forces are examples of conservative forces.
  • We can extend this observation to other conservative force systems as well.
  • The total work by the conservative force for the round trip is zero:
  • For a conservative force, work done via different path is the same.

• Preservation and Restoration

  • The activities involved in this profession include examination, documentation, treatment, and preventative conservation.
  • The conservator acts as a sort of steward for these objects, which range from archaeological to artistic.
  • In addition, numerous organizations create standardized methodologies for the conservation of art objects, such as the International Institute for the Conservation of Historic and Artistic Works and the American Institute for Conservation.
  • Conservators are often involved in what is termed "preventative conservation," which refers to protecting art and cultural works from damage from environmental conditions, such as temperature, humidity, and exposure to light.
  • "Interventive conservation" refers to any act that involves a direct interaction between the conservator and the cultural material, such as cleaning, stabilizing, repairing, or replacing of parts.

• Conservation of Angular Momentum

  • These examples have the hallmarks of a conservation law.
  • The conserved quantity we are investigating is called angular momentum.
  • Just as linear momentum is conserved when there is no net external forces, angular momentum is constant or conserved when the net torque is zero.
  • This is an expression for the law of conservation of angular momentum.
  • Conservation of angular momentum is one of the key conservation laws in physics, along with the conservation laws for energy and (linear) momentum.

• Problem Solving With the Conservation of Energy

  • To solve a conservation of energy problem determine the system of interest, apply law of conservation of energy, and solve for the unknown.
  • If you know the potential energies ($PE$) for the forces that enter into the problem, then forces are all conservative, and you can apply conservation of mechanical energy simply in terms of potential and kinetic energy.
  • The equation expressing conservation of energy is: $KE_i+PE_i=KE_f+PE_f$.
  • where $OE$ stand for all other energies, and $W_{nc}$ stands for work done by non-conservative forces.
  • The problems are taken from "The Joy of Physics. " This one deals with energy conservation.

• Conservative Vector Fields

  • A conservative vector field is a vector field which is the gradient of a function, known in this context as a scalar potential.
  • A conservative vector field is a vector field which is the gradient of a function, known in this context as a scalar potential.
  • Conversely, path independence is equivalent to the vector field's being conservative.
  • Conservative vector fields are also irrotational, meaning that (in three dimensions) they have vanishing curl.
  • Therefore, the curl of a conservative vector field $\mathbf{v}$ is always $0$.

• Political Ideology

  • Among those who do identify as either liberal or conservative, few identify as "far left" or "far right. " Most Americans either identify as "moderate" or as "somewhat" liberal or conservative.
  • In another polling in June 2010, 40% of American voters identify themselves as conservatives, 36% as moderates and 22% as liberals, with a strong majority of both liberals and conservatives describing themselves as closer to the center than to the extremes .
  • Moderates are commonly defined through limiting the extent to which they adopt liberal and conservative ideas.
  • Libertarians commonly hold liberal views on social issues but conservative views on economic issues.
  • Within the left are the largely secular and anti-war "Liberals", the socially conservative but economically left "Conservative Democrats", and the economically "Disadvantaged Democrats" who favor extended government assistance to the needy.

• Legislative Leadership

  • During his second term, Theodore Roosevelt embraced legislation aimed at conserving the natural environment.
  • During his second term, President Theodore Roosevelt embraced legislation aimed at conserving the natural environment.
  • Roosevelt was deeply committed to conserving natural resources, and historians largely consider him as the nation's first conservation president.
  • In 1903, Roosevelt toured the Yosemite Valley with John Muir, who had a very different view of conservation, and tried to minimize commercial use of water resources and forests.
  • As depicted in this cartoon, conservation was as an important project throughout Roosevelt's presidency.

• Linear Momentum

  • Momentum is conserved in both inelastic and elastic collisions.
  • Momentum, like energy, is important because it is conserved.
  • "Newton's cradle" shown in is an example of conservation of momentum.
  • Only a few physical quantities are conserved in nature.
  • Total momentum of the system (or Cradle) is conserved.