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  2. Radar cross section - Wikipedia

    en.wikipedia.org/wiki/Radar_cross_section

    The size of a target's image on radar is measured by the radar cross section or RCS, often represented by the symbol σ and expressed in square meters. This does not equal geometric area. A perfectly conducting sphere of projected cross sectional area 1 m 2 (i.e. a diameter of 1.13 m) will have an RCS of 1 m 2. For radar wavelengths much less ...

  3. Area density - Wikipedia

    en.wikipedia.org/wiki/Area_density

    Fabric "weight" is often specified as mass per unit area, grams per square meter (gsm) or ounces per square yard. It is also sometimes specified in ounces per yard in a standard width for the particular cloth. One gram per square meter equals 0.0295 ounces per square yard; one ounce per square yard equals 33.9 grams per square meter.

  4. Paper density - Wikipedia

    en.wikipedia.org/wiki/Paper_density

    Weighing scale to determine paper weight. Paper density is a paper product's mass per unit volume.The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).

  5. List of moments of inertia - Wikipedia

    en.wikipedia.org/wiki/List_of_moments_of_inertia

    This expression assumes that the rod is an infinitely thin (but rigid) wire. This is also a special case of the thin rectangular plate with axis of rotation at the end of the plate, with h = L and w = 0. = [1] Thin circular loop of radius r and mass m.

  6. Paper and ink testing - Wikipedia

    en.wikipedia.org/wiki/Paper_and_ink_testing

    (Mass is usually measured as weight at a location with sea-level gravity.) Paper sheets are cut to a size of 10 cm × 10 cm, then the sheets are weighed individually. The mean of the weights is used to calculate the mass of the paper per square meter, and the standard deviation is determined from all samples.

  7. Vibration of plates - Wikipedia

    en.wikipedia.org/wiki/Vibration_of_plates

    Vibration mode of a clamped square plate. The vibration of plates is a special case of the more general problem of mechanical vibrations.The equations governing the motion of plates are simpler than those for general three-dimensional objects because one of the dimensions of a plate is much smaller than the other two.

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  9. Flexural rigidity - Wikipedia

    en.wikipedia.org/wiki/Flexural_rigidity

    The plate elastic thickness (usually referred to as effective elastic thickness of the lithosphere). The elastic properties of the plate; The applied load or force; As flexural rigidity of the plate is determined by the Young's modulus, Poisson's ratio and cube of the plate's elastic thickness, it is a governing factor in both (1) and (2).