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  2. Boltzmann constant - Wikipedia

    en.wikipedia.org/wiki/Boltzmann_constant

    The Boltzmann constant (k B or k) is the proportionality factor that relates the average relative thermal energy of particles in a gas with the thermodynamic temperature of the gas. [2] It occurs in the definitions of the kelvin (K) and the gas constant , in Planck's law of black-body radiation and Boltzmann's entropy formula , and is used in ...

  3. Coulomb's law - Wikipedia

    en.wikipedia.org/wiki/Coulomb's_law

    Here, k e is a constant, q 1 and q 2 are the quantities of each charge, and the scalar r is the distance between the charges. The force is along the straight line joining the two charges. If the charges have the same sign, the electrostatic force between them makes them repel; if they have different signs, the force between them makes them attract.

  4. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    For example, the kilogram is defined by taking the Planck constant h to be 6.626 070 15 × 10 −34 J⋅s, giving the expression in terms of the defining constants [1]: 131 1 kg = ⁠ ( 299 792 458 ) 2 / ( 6.626 070 15 × 10 −34 )( 9 192 631 770 ) ⁠ ⁠ h Δ ν Cs / c 2 ⁠ .

  5. Heat transfer physics - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer_physics

    Conduction heat flux q k for ideal gas is derived with the gas kinetic theory or the Boltzmann transport equations, and the thermal conductivity is =, -, where u f 2 1/2 is the RMS (root mean square) thermal velocity (3k B T/m from the MB distribution function, m: atomic mass) and τ f-f is the relaxation time (or intercollision time period ...

  6. Boltzmann's entropy formula - Wikipedia

    en.wikipedia.org/wiki/Boltzmann's_entropy_formula

    where is the Boltzmann constant (also written as simply ) and equal to 1.380649 × 10 −23 J/K, and is the natural logarithm function (or log base e, as in the image above). In short, the Boltzmann formula shows the relationship between entropy and the number of ways the atoms or molecules of a certain kind of thermodynamic system can be arranged.

  7. Follow These Syrian Refugees As They Risk Everything For A ...

    testkitchen.huffingtonpost.com/1000-miles/?ncid=...

    Seven countries, an ocean and over a thousand miles stand between them and their dreams for a future

  8. Amazon sued by D.C. AG for allegedly excluding neighborhoods ...

    www.aol.com/amazon-sued-d-c-ag-153853628.html

    Washington, D.C.’s attorney general sued Amazon on Wednesday, accusing the company of covertly depriving residents in certain ZIP codes in the nation’s capital from access to Prime’s high ...

  9. Russian stowaway now charged for sneaking onto Delta flight ...

    www.aol.com/russian-stowaway-now-charged...

    The Russian woman accused of sneaking onto a Delta Air Lines flight from New York to Paris has been charged with knowingly and intentionally secreting herself aboard an airplane. Svetlana Dali, 57 ...