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  2. Endoplasmic reticulum - Wikipedia

    en.wikipedia.org/wiki/Endoplasmic_reticulum

    It is a type of organelle made up of two subunits – rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER). The endoplasmic reticulum is found in most eukaryotic cells and forms an interconnected network of flattened, membrane-enclosed sacs known as cisternae (in the RER), and tubular structures in the SER.

  3. Respiratory quotient - Wikipedia

    en.wikipedia.org/wiki/Respiratory_quotient

    A RQ near 0.7 indicates that fat is the predominant fuel source, a value of 1.0 is indicative of carbohydrate being the predominant fuel source, and a value between 0.7 and 1.0 suggests a mix of both fat and carbohydrate. [6] In general a mixed diet corresponds with an RER of approximately 0.8. [7]

  4. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    barn (10^-28 m^2) surface tension: newton per meter (N/m) tau: torque: newton meter (N⋅m) shear stress: pascal time constant: second (s) 6.28318... unitless phi: field strength: unit varies depending on context magnetic flux: weber (Wb) electric potential: volt (V) Higgs field work function

  5. Relative velocity - Wikipedia

    en.wikipedia.org/wiki/Relative_velocity

    The figure shows a man on top of a train, at the back edge. At 1:00 pm he begins to walk forward at a walking speed of 10 km/h (kilometers per hour). The train is moving at 40 km/h. The figure depicts the man and train at two different times: first, when the journey began, and also one hour later at 2:00 pm.

  6. Elastic scattering - Wikipedia

    en.wikipedia.org/wiki/Elastic_scattering

    Elastic scattering is a form of particle scattering in scattering theory, nuclear physics and particle physics. In this process, the internal states of the particles involved stay the same. In the non-relativistic case, where the relative velocities of the particles are much less than the speed of light , elastic scattering simply means that ...

  7. Surface-enhanced Raman spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Surface-enhanced_Raman...

    A difference in selection rules is visible: Some bands appear only in the bulk-phase Raman spectrum or only in the SERS spectrum. Surface-enhanced Raman spectroscopy or surface-enhanced Raman scattering ( SERS ) is a surface-sensitive technique that enhances Raman scattering by molecules adsorbed on rough metal surfaces or by nanostructures ...

  8. Relativistic mechanics - Wikipedia

    en.wikipedia.org/wiki/Relativistic_mechanics

    In chemistry, the mass differences associated with the emitted energy are around 109 of the molecular mass. [6] However, in nuclear reactions the energies are so large that they are associated with mass differences, which can be estimated in advance, if the products and reactants have been weighed (atoms can be weighed indirectly by using ...

  9. On shell and off shell - Wikipedia

    en.wikipedia.org/wiki/On_shell_and_off_shell

    The four-momentum of the virtual particle is the difference between the four-momenta of the incoming and outgoing particles. Virtual particles corresponding to internal propagators in a Feynman diagram are in general allowed to be off shell, but the amplitude for the process will diminish depending on how far off shell they are. [ 4 ]