NEET-XI-Chemistry

01: Some Basic Concepts of Chemistry

page 2
  • #13
    Pressure is determined as force per unit area of the surface. The SI unit of pressure, Pascal is as shown below:

    1Pa = 1N m-2

    If mass of air at sea level is 1034 g cm-2, calculate the pressure in Pascal.
    Ans : Pressure is defined as force acting per unit area of the surface.



    = 1.01332 × 105 kg m-1s-2

    We know,

    1 N = 1 kg ms-2

    Then,

    1 Pa = 1 Nm-2 = 1 kg m-2s-2

    1 Pa = 1 kg m-1s-2

    ∴ Pressure = 1.01332 × 105 Pa