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  2. Planck relation - Wikipedia

    en.wikipedia.org/wiki/Planck_relation

    The Planck relation [1] [2] [3] (referred to as Planck's energy–frequency relation, [4] the Planck–Einstein relation, [5] Planck equation, [6] and Planck formula, [7] though the latter might also refer to Planck's law [8] [9]) is a fundamental equation in quantum mechanics which states that the energy E of a photon, known as photon energy, is proportional to its frequency ν: =.

  3. Hydroxyl value - Wikipedia

    en.wikipedia.org/wiki/Hydroxyl_value

    Where HV is the hydroxyl value; V B is the amount (ml) potassium hydroxide solution required for the titration of the blank; V acet is the amount (ml) of potassium hydroxide solution required for the titration of the acetylated sample; W acet is the weight of the sample (in grams) used for acetylation; N is the normality of the titrant; 56.1 is ...

  4. Electric vehicle battery - Wikipedia

    en.wikipedia.org/wiki/Electric_vehicle_battery

    If NMC pouch cell is used, the total emission increases to almost 10 kg CO 2 e kg battery − 1 while materials manufacturing still contributes to more than 50% of the emission. [56] During the end-of-life management phase, the refurbishing process adds little emission to the lifecycle emission.

  5. Paschen's law - Wikipedia

    en.wikipedia.org/wiki/Paschen's_law

    [1] Paschen's law is an equation that gives the breakdown voltage, that is, the voltage necessary to start a discharge or electric arc, between two electrodes in a gas as a function of pressure and gap length. [2] [3] It is named after Friedrich Paschen who discovered it empirically in 1889. [4]

  6. Electrochemical potential - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_potential

    In generic terms, electrochemical potential is the mechanical work done in bringing 1 mole of an ion from a standard state to a specified concentration and electrical potential. According to the IUPAC definition, [ 4 ] it is the partial molar Gibbs energy of the substance at the specified electric potential, where the substance is in a ...

  7. Corona discharge - Wikipedia

    en.wikipedia.org/wiki/Corona_discharge

    Corona discharge from high-voltage electric power transmission lines constitutes an economically significant waste of energy for utilities. In high-voltage equipment like cathode-ray-tube televisions , radio transmitters , X-ray machines , and particle accelerators , the current leakage caused by coronas can constitute an unwanted load on the ...

  8. Butler–Volmer equation - Wikipedia

    en.wikipedia.org/wiki/Butler–Volmer_equation

    At a certain voltage E e, equilibrium will attain and the forward and backward rates (v f and v b) will be equal. This is represented by the green curve in the above figure. The equilibrium rate constants will be written as k fe and k be, and the equilibrium concentrations will be written c oe and c re.

  9. Electrochemical window - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_window

    The electrochemical window (EW) is an important concept in organic electrosynthesis and design of batteries, especially organic batteries. [5] This is because at higher voltage (greater than 4.0 V) organic electrolytes decompose and interferes with the oxidation and reduction of the organic cathode/anode materials.