critical mass

Examples of critical mass in the following topics:

• The Rate of Adoption

  • Within the rate of adoption there is a point at which an innovation reaches critical mass.
  • Critical mass is the time in the adoption curve when enough individuals have adopted an innovation so that the continued adoption of the innovation is self-sustaining.
  • This graph depicts the innovation curve and the tipping point, or critical mass.

• Agenda-Setting Theory

  • In reality, mass media only shows the audience what it comprehends as an important issue.
  • Mass communication plays an important role in our society.
  • Mass communication is defined in " Mass Media, Mass Culture" as the process whereby professional communicators use technological devices to share messages over great distances to influence large audiences.
  • One of the most critical aspects in the concept of an agenda-setting role of mass communication is the time frame for this phenomenon.
  • Mass-media coverage in general and agenda-setting in particular also have a powerful impact on what individuals think that other people are thinking, and hence tend to allocate more importance to issues that have been extensively covered by mass media.

• Exercises

  • So both masses oscillate at the same frequency $\omega_0$ .
  • Initially the spring has no mass attached to it.
  • You apply a 100 gram mass to the spring, pull the mass down and let it go.
  • Answer: $\gamma _ {\rm critical} = 2 \omega _0 = 2 \times 2 \pi \times 2 {\rm s^{-1}} \approx 25 {\rm s^{-1}}$ .
  • With this minimum (or "critical") damping, how long will it take for the mass to come to rest?

• Propaganda and the Mass Media

  • Mass media can be employed to manipulate populations to further the power elite's agenda.
  • Herman and Noam Chomsky to explain how propaganda and systemic biases function in mass media.
  • They argue that such a portrayal was often used as a means to silence voices critical of elite interests.
  • These two models—the propaganda and the "power elite" conceptualization—evidence how mass media can be used to reinforce the powerful's positions of power and interests.
  • Evaluate the impact of mass media as propaganda, particularly in terms of the "power elite"

• 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.
  • The physical property we are covering in this atom is called mass.
  • Weight is a different property of matter that, while related to mass, is not mass, but rather the amount of gravitational force acting on a given body of matter.
  • Mass is an intrinsic property that never changes.
  • The International System of Units (SI) measures mass in kilograms, or kg.

• Physics and Engeineering: Center of Mass

  • For a continuous mass distribution, the position of center of mass is given as $\mathbf R = \frac 1M \int_V\rho(\mathbf{r}) \mathbf{r} dV$ .
  • In physics, the center of mass (COM) of a mass or object in space is the unique point at which the weighted relative position of the distributed mass sums to zero.
  • In this case, the distribution of mass is balanced around the center of mass and the average of the weighted position coordinates of the distributed mass defines its coordinates.
  • where $M$ is the total mass in the volume.
  • The two objects are rotating around their center of mass.

• Locating the Center of Mass

  • The center of mass is a statement of spatial arrangement of mass (i.e. distribution of mass within the system).
  • where M is the total mass in the volume.
  • If a continuous mass distribution has uniform density, which means ρ is constant, then the center of mass is the same as the center of the volume.
  • Thus, the center of mass of a circular cylinder of constant density has its center of mass on the axis of the cylinder.
  • Identify the center of mass for an object with continuous mass distribution

• Marx and the "Opiate of the Masses"

  • It was translated from the German original, "Die Religion ... ist das Opium des Volkes," and is often referred to as "religion is the opiate of the masses. " Taken in context, Marx is arguing that religion was constructed by people to calm uncertainty over our role in the universe and in society .
  • Marx's approach to sociology was critical in the sense that, in contrast to the knowledge for knowledge's sake approach, it advocated change.
  • Criticism of the system in place when he was writing was inherent in Marx's approach; because of this, he took a particular stand on the existence of religion, namely, that it should be done away with.

• Molar Mass of Compounds

  • The molar mass of a particular substance is the mass of one mole of that substance.
  • The mass of one mole of atoms of a pure element in grams is equivalent to the atomic mass of that element in atomic mass units (amu) or in grams per mole (g/mol).
  • Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol.
  • The characteristic molar mass of an element is simply the atomic mass in g/mol.
  • However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol).

• 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.
  • In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.
  • 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.
  • However, the law of conservation of mass remains a useful concept in chemistry, since the energy produced or consumed in a typical chemical reaction accounts for a minute amount of mass.