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  2. C-4 (explosive) - Wikipedia

    en.wikipedia.org/wiki/C-4_(explosive)

    C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C, which uses RDX as its explosive agent. C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical. C-4 has a texture similar to modelling clay and can be molded into any ...

  3. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    Analytic continuation around the pole at s = 1 leads to a region of negative values, including ζ(−1) = ⁠− + 1 / 12 ⁠. In zeta function regularization , the series ∑ n = 1 ∞ n {\textstyle \sum _{n=1}^{\infty }n} is replaced by the series ∑ n = 1 ∞ n − s . {\textstyle \sum _{n=1}^{\infty }n^{-s}.}

  4. Common-mode rejection ratio - Wikipedia

    en.wikipedia.org/wiki/Common-mode_rejection_ratio

    Common-mode rejection ratio. In electronics, the common mode rejection ratio ( CMRR) of a differential amplifier (or other device) is a metric used to quantify the ability of the device to reject common-mode signals, i.e. those that appear simultaneously and in-phase on both inputs. An ideal differential amplifier would have infinite CMRR ...

  5. Aviation transponder interrogation modes - Wikipedia

    en.wikipedia.org/wiki/Aviation_transponder...

    Mode 3/A is often combined with Mode C to provide altitude information as well. C: Provides the aircraft's pressure altitude and is usually combined with Mode 3/A to provide a combination of a 4-digit octal code and altitude as Mode 3 A/C, often referred to as Mode A and C: 4: Provides a 3-pulse reply, delay is based on the encrypted challenge: 5

  6. Negative refraction - Wikipedia

    en.wikipedia.org/wiki/Negative_refraction

    Negative refraction. Negative refraction is the electromagnetic phenomenon where light rays become refracted at an interface that is opposite to their more commonly observed positive refractive properties. Negative refraction can be obtained by using a metamaterial which has been designed to achieve a negative value for (electric) permittivity ...

  7. Mass-to-charge ratio - Wikipedia

    en.wikipedia.org/wiki/Mass-to-charge_ratio

    The mass-to-charge ratio ( m / Q) is a physical quantity relating the mass (quantity of matter) and the electric charge of a given particle, expressed in units of kilograms per coulomb (kg/C). It is most widely used in the electrodynamics of charged particles, e.g. in electron optics and ion optics .

  8. Common mode current - Wikipedia

    en.wikipedia.org/wiki/Common_Mode_Current

    Common mode current is the portion of conductor currents that are unmatched with the exactly opposite and equal magnitude currents. [1] Common mode current cause multiconductors to act or behave like a single conductor. In electromagnetic compatibility (EMC), there are two common terms that will be found in many electromagnetic interference ...

  9. Coulomb - Wikipedia

    en.wikipedia.org/wiki/Coulomb

    The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). [1] [2] It is equal to the electric charge delivered by a 1 ampere current in 1 second and is defined in terms of the elementary charge e, at about 6.241 509 × 1018 e. [2] [1]