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  2. National Standard Examination in Astronomy - Wikipedia

    en.wikipedia.org/wiki/National_Standard...

    The paper consists of 48 single correct type and 12 multiple correct type questions. It has a time limit of 2 hours. There are questions from high school level physics, mathematics and some questions from general astronomy.

  3. Resonance - Wikipedia

    en.wikipedia.org/wiki/Resonance

    Resonance in particle physics appears in similar circumstances to classical physics at the level of quantum mechanics and quantum field theory. Resonances can also be thought of as unstable particles, with the formula in the Universal resonance curve section of this article applying if Γ is the particle's decay rate and Ω is the particle's ...

  4. Resonance (particle physics) - Wikipedia

    en.wikipedia.org/wiki/Resonance_(particle_physics)

    Thus, the lifetime of a particle is the direct inverse of the particle's resonance width. For example, the charged pion has the second-longest lifetime of any meson, at 2.6033 × 10 −8 s. [2] Therefore, its resonance width is very small, about 2.528 × 10 −8 eV or about 6.11 MHz. Pions are generally not considered as "resonances".

  5. Helmholtz resonance - Wikipedia

    en.wikipedia.org/wiki/Helmholtz_resonance

    The concept of Helmholtz resonance is fundamental in various fields, including acoustics, engineering, and physics. The resonator itself, termed a Helmholtz resonator, consists of two key components: a cavity and a neck. The size and shape of these components are crucial in determining the resonant frequency, which is the frequency at which the ...

  6. Resonances in scattering from potentials - Wikipedia

    en.wikipedia.org/wiki/Resonances_in_scattering...

    In quantum mechanics, resonance cross section occurs in the context of quantum scattering theory, which deals with studying the scattering of quantum particles from potentials. The scattering problem deals with the calculation of flux distribution of scattered particles/waves as a function of the potential, and of the state (characterized by ...

  7. Resonator - Wikipedia

    en.wikipedia.org/wiki/Resonator

    To cause resonance, the phase of a sinusoidal wave after a round trip must be equal to the initial phase so the waves self-reinforce. The condition for resonance in a resonator is that the round trip distance, 2 d {\displaystyle 2d\,} , is equal to an integer number of wavelengths λ {\displaystyle \lambda \,} of the wave:

  8. Newfoundland's Funny Way of Letting Dad Know It's Time to Go ...

    www.aol.com/newfoundlands-funny-way-letting-dad...

    The dog was so confused. Dad's jacket was on, but they weren't going for a stroll — what gives?!. Related: Newfoundland Believing She Gave Birth to Bunnies Is the Sweetest Thing All Week

  9. Mikheyev–Smirnov–Wolfenstein effect - Wikipedia

    en.wikipedia.org/wiki/Mikheyev–Smirnov...

    The Mikheyev–Smirnov–Wolfenstein effect (often referred to as the matter effect) is a particle physics process which modifies neutrino oscillations in matter of varying density. The MSW effect is broadly analogous to the differential retardation of sound waves in density-variable media, however it also involves the propagation dynamics of ...