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  2. Average cost - Wikipedia

    en.wikipedia.org/wiki/Average_cost

    If the firm is a perfect competitor in all input markets, and thus the per-unit prices of all its inputs are unaffected by how much of the inputs the firm purchases, then it can be shown [1] [2] [3] that at a particular level of output, the firm has economies of scale (i.e., is operating in a downward sloping region of the long-run average cost ...

  3. Link budget - Wikipedia

    en.wikipedia.org/wiki/Link_budget

    For example, a "2 by 4" wood stud wall with drywall on both sides results in about 6 dB loss per wall at 2.4 GHz. [2] Older buildings may have even greater internal losses than new buildings due to materials and line of sight issues. Experience has shown that line-of-sight propagation holds only for about the first 3 meters.

  4. Marginal cost - Wikipedia

    en.wikipedia.org/wiki/Marginal_cost

    The first component is the per-unit or average cost. The second component is the small increase in cost due to the law of diminishing marginal returns which increases the costs of all units sold. Marginal costs can also be expressed as the cost per unit of labor divided by the marginal product of labor. [5]

  5. Average per-bit delivery cost - Wikipedia

    en.wikipedia.org/wiki/Average_per-bit_delivery_cost

    Example of calculation of Average Per-Bit Delivery Cost for a small data-flow. Average Per-Bit Delivery Cost divides the cost of however many bits were actually modulated across a network or component of a network over a period of time by the total operational and amortized capital expenses associated with the network or component over the same time-period, to produce an average cost for the ...

  6. Environmental impact of concrete - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Additionally, this value is based only on mix proportions of up to 20% fly ash. It is estimated that a 1% replacement of cement with fly ash represents a 0.7% reduction in energy consumption. With some proposed mixes containing as much as 80% fly ash, this could represent a considerable energy saving. [16]

  7. Closed-circuit television - Wikipedia

    en.wikipedia.org/wiki/Closed-circuit_television

    By 1963, CCTV was being used in Munich to monitor traffic. [17] Closed-circuit television was used as a form of pay-per-view theatre television for sports such as professional boxing and professional wrestling, and from 1964 through 1970, the Indianapolis 500 automobile race. Boxing telecasts were broadcast live to a select number of venues ...

  8. Ready-mix concrete - Wikipedia

    en.wikipedia.org/wiki/Ready-mix_concrete

    The output obtained from a site mix concrete plant using a 8/12 mixer is 4 to 5 metric cubes per hour which is 30-60 metric cubes per hour in a ready mix concrete plant. Better handling and proper mixing practice will help reduce the consumption of cement by 10 – 12%.

  9. Coaxial cable - Wikipedia

    en.wikipedia.org/wiki/Coaxial_cable

    A cable with twice the diameter will have half the skin effect resistance. Ignoring dielectric and other losses, the larger cable would halve the dB/meter loss. In designing a system, engineers consider not only the loss in the cable but also the loss in the connectors. Velocity of propagation, in meters per second.

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