Q 1 :    

Mercury is filled in a tube of radius 2 cm up to a height of 30 cm. The force exerted by mercury on the bottom of the tube is ________ N.

(Given, atmospheric pressure=105 Nm-2,density of mercury 1.36×104kg m-3,g=10 ms-2,π=227)                       [2024]



(177)       P=P0+ρgh

               F=P0A+ρghA=227×4×10-4(105+1.36×104×10×30100)

              F=887×10-4(105+0.408×105)

               =887×10×1.408=177