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  2. Cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Cutoff_frequency

    In electronics, cutoff frequency or corner frequency is the frequency either above or below which the power output of a circuit, such as a line, amplifier, or electronic filter has fallen to a given proportion of the power in the passband. Most frequently this proportion is one half the passband power, also referred to as the 3 dB point since a ...

  3. Safe-haven law - Wikipedia

    en.wikipedia.org/wiki/Safe-haven_law

    By 2008, all 50 states had a form of safe-haven law. Controversy. Supporters of safe-haven laws argue that the laws save lives by encouraging parents to surrender infants safely, providing an alternative to abortion, infanticide, or child abandonment. Detractors argue that, because safe-haven laws do not require parents to be under stress, one ...

  4. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    The DOT code [1] is an alphanumeric character sequence molded into the sidewall of the tire and allows the identification of the tire and its age. The code is mandated by the U.S. Department of Transportation [2] but is used worldwide. [3] The DOT code is also useful in identifying tires subject to product recall [4] or at end of life due to age.

  5. Coupon - Wikipedia

    en.wikipedia.org/wiki/Coupon

    Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...

  6. NASA spin-off technologies - Wikipedia

    en.wikipedia.org/wiki/NASA_spin-off_technologies

    Spinoff is a NASA publication featuring technology made available to the public. Since 1976, NASA has featured an average of 50 technologies each year in the annual publication, and Spinoff maintains a searchable database of these technologies. When products first spun off from space research, NASA presented a black and white report in 1973 ...

  7. VTOL - Wikipedia

    en.wikipedia.org/wiki/VTOL

    Sikorsky tested an aircraft dubbed the X-Wing, which took off in the manner of a helicopter. The rotors would become stationary in mid-flight, and function as wings, providing lift in addition to the static wings. Boeing X-50 is a Canard Rotor/Wing prototype that utilizes a similar concept. Fairey Jet Gyrodyne

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