pa

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Related to alveolar pressure: pleural pressure, Transpulmonary pressure, intrapleural pressure

Pa,

symbol for the element protactiniumprotactinium
, radioactive chemical element; symbol Pa; at. no. 91; mass number of most stable isotope 231; m.p. greater than 1,600°C;; b.p. 4,026°C;; sp. gr. 15.37 (calculated); valence +4, +5. Protactinium is a malleable, shiny silver-gray radioactive metal.
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PA

or

p.a.

Abbrev. for position angle.

Pennsylvania State Information

Phone: (717) 787-2121
www.state.pa.us


Area (sq mi):: 46055.24 (land 44816.61; water 1238.63) Population per square mile: 277.30
Population 2005: 12,429,616 State rank: 0 Population change: 2000-20005 1.20%; 1990-2000 3.40% Population 2000: 12,281,054 (White 84.10%; Black or African American 10.00%; Hispanic or Latino 3.20%; Asian 1.80%; Other 2.80%). Foreign born: 4.10%. Median age: 38.00
Income 2000: per capita $20,880; median household $40,106; Population below poverty level: 11.00% Personal per capita income (2000-2003): $29,695-$31,911
Unemployment (2004): 5.40% Unemployment change (from 2000): 1.20% Median travel time to work: 25.20 minutes Working outside county of residence: 27.60%

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    pA

    (electricity)

    Pa

    (mechanics)
    (chemistry)

    Pa

    Symbol for pascal; a unit of pressure.

    PA

    On drawings, abbr. for public address system.

    pascal (Pa)

    The Standard International unit of pressure; 1 pascal is equal to 1 newton per square meter.

    pa

    , pah NZ
    1. a Maori village or settlement
    2. History a Maori defensive position and settlement on a hilltop

    pa

    (networking)
    The country code for Panama.
    References in periodicals archive ?
    PPLAT faithfully approximates alveolar pressure and as such is a very useful clinical assessment tool.
    The mean airway pressure (mPAW) recorded under passive conditions is the only indicator of the mean alveolar pressure.
    Higher frequencies will deliver lower tidal volume as well as diminish the degree of alveolar pressure swings.