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  2. Nicotine - Wikipedia

    en.wikipedia.org/wiki/Nicotine

    Nicotine is a hygroscopic, colorless to yellow-brown, oily liquid, that is readily soluble in alcohol, ether or light petroleum. It is miscible with water in its neutral amine base form between 60 °C and 210 °C. It is a dibasic nitrogenous base, having K b1 =1×10 −6, K b2 =1×10 −11. [ 162]

  3. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    If the lens is held at a distance from the object such that its front focal point is on the object being viewed, the relaxed eye (focused to infinity) can view the image with angular magnification = Here, is the focal length of the lens in centimeters. The constant 25 cm is an estimate of the "near point" distance of the eye—the closest ...

  4. Alphabet Inc. - Wikipedia

    en.wikipedia.org/wiki/Alphabet_Inc.

    This translated to a total revenue of US$110,855 million in 2017 and a net income of US$12,662 million. On February 1, 2016, Alphabet Inc. surpassed Apple to become the world's most valuable publicly traded company until February 3, 2016, when Apple surged back over Alphabet to retake the position.

  5. Contactless smart card - Wikipedia

    en.wikipedia.org/wiki/Contactless_smart_card

    A contactless smart card is a contactless credential whose dimensions are credit card size. Its embedded integrated circuits can store (and sometimes process) data and communicate with a terminal via NFC. Commonplace uses include transit tickets, bank cards and passports. There are two broad categories of contactless smart cards.

  6. Fresnel equations - Wikipedia

    en.wikipedia.org/wiki/Fresnel_equations

    Fresnel equations. Partial transmission and reflection of a pulse travelling from a low to a high refractive index medium. At near-grazing incidence, media interfaces appear mirror-like especially due to reflection of the s polarization, despite being poor reflectors at normal incidence. Polarized sunglasses block the s polarization, greatly ...

  7. Galaxy - Wikipedia

    en.wikipedia.org/wiki/Galaxy

    Galaxy. NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light-years in diameter and approximately 60 million light-years from Earth. A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [ 1][ 2] The word is derived from the Greek galaxias ...

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