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  2. Standard electrode potential - Wikipedia

    The electric potential also varies with temperature, concentration and pressure. Since the oxidation potential of a half-reaction is the negative of the reduction potential in a redox reaction, it is sufficient to calculate either one of the potentials. Therefore, standard electrode potential is commonly written as standard reduction potential.

  3. Standard electrode potential (data page) - Wikipedia

    For example, the equation Fe 2+ + 2 e− ⇌ Fe ( s) (–0.44 V) means that it requires 2 × 0.44 eV = 0.88 eV of energy to be absorbed (hence the minus sign) in order to create one neutral atom of Fe ( s) from one Fe 2+ ion and two electrons, or 0.44 eV per electron, which is 0.44 J/C of electrons, which is 0.44 V.

  4. SEP-IRA - Wikipedia

    Thus, the overall contribution limit (barring limits) is 20% of 92.9% (that is, 18.6%) of net profit. For example, if a sole proprietor has $50,000 net profit from self-employment on Schedule C, then the "1/2 of self-employment tax credit", $3,532, shown on adjustments to income at the bottom of form 1040, will be deducted from the net profit.

  5. Calculator - Wikipedia

    By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called "Cal Tech", whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...

  6. Circular error probable - Wikipedia

    Measure of Probability (%); DRMS 63.213... CEP 50 2DRMS 98.169... R95 95 R99.7 We can then derive a conversion table to convert values expressed for one percentile level, to another.

  7. Six degrees of separation - Wikipedia

    Six degrees of separation is the idea that all people are six or fewer social connections away from each other. As a result, a chain of "friend of a friend" statements can be made to connect any two people in a maximum of six steps. It is also known as the six handshakes rule. [1]

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