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.

Q- 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.

Answer
Pressure is defined as force acting per unit area of the surface 

                P =  F/ A  

                

                                  

                                  = 1.01332 × 105 kg m–1s–2
                                                           
                   We know,
                            1 N = 1 kg ms–2
                 Then  1 Pa = 1 Nm–2 = 1 kg m s–2*m-2
                          1 Pa = 1 kg m–1s–2
                                        Pressure = 1.01332 × 10^5 Pa