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  2. Dynamic response index - Wikipedia

    en.wikipedia.org/wiki/Dynamic_response_index

    The Dynamic Response Index (DRI) is a measure of the likelihood of spinal damage arising from a vertical shock load such as might be encountered in a military environment (i.e., during a mine blast, or in an ejection seat). The DRI is a dimensionless number which is proportional to the maximum spinal compression suffered during the event.

  3. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    Near the surface of the Earth, the acceleration due to gravity g = 9.807 m/s 2 (metres per second squared, which might be thought of as "metres per second, per second"; or 32.18 ft/s 2 as "feet per second per second") approximately. A coherent set of units for g, d, t and v is essential.

  4. Terminal ballistics - Wikipedia

    en.wikipedia.org/wiki/Terminal_ballistics

    For steel targets, the concern is to provide enough force to knock over the target while minimizing the damage to the target. A soft lead bullet, or jacketed hollow-point bullet , or soft-point bullet will flatten out on impact (if the velocity at impact is sufficient to make it deform), spreading the impact over a larger area of the target ...

  5. Rate of fire - Wikipedia

    en.wikipedia.org/wiki/Rate_of_fire

    At 50 rps (3,000 rpm), a five-second burst from an M134 Minigun would use approximately 6.3 kilograms (14 lb) of 7.62 mm ammunition; this alone would make it an impractical weapon for infantry who have to carry a reasonable supply of ammunition with them. For this and other reasons, weapons with such high rates of fire are typically only found ...

  6. Counts per minute - Wikipedia

    en.wikipedia.org/wiki/Counts_per_minute

    Disintegrations per minute (dpm) and disintegrations per second (dps) are measures of the activity of the source of radioactivity. The SI unit of radioactivity, the becquerel (Bq), is equivalent to one disintegration per second. This unit should not be confused with cps, which is the number of counts received by an instrument from the source.

  7. Blip-to-scan ratio - Wikipedia

    en.wikipedia.org/wiki/Blip-to-scan_ratio

    A "scan" is a single search of the entire sky made by the rotating antenna. A radar with a low blip-to-scan ratio draws only a few reflections from an object (mainly aircraft), making it more difficult to detect. For an aircraft flying at high speed and altitude the ratio is further reduced, rendering the aircraft almost invisible to radar.

  8. Damage per second - Wikipedia

    en.wikipedia.org/?title=Damage_per_second&...

    Glossary of video game terms#Damage per second To a list entry : This is a redirect to a list in which the subject is an entry. For redirects from a topic to a related list and not to an entry on that list, use {{ R from list topic }} instead .

  9. Mass flow rate - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_rate

    The area required to calculate the mass flow rate is real or imaginary, flat or curved, either as a cross-sectional area or a surface, e.g. for substances passing through a filter or a membrane, the real surface is the (generally curved) surface area of the filter, macroscopically - ignoring the area spanned by the holes in the filter/membrane ...