Question

the pressure difference across A pipe of length 5 cm is 2 ×10 power 5 pa. work done by pressure in forcing.2 M cube of water through the pipe is

Answer 1

Here,                                 
                                           Water moved (Area)=2 m3.
                                                             Pressure=105 Pa.
                                Radius of the pipe(Length)=1 cm.
                                                                 Force=  F     ------------(say)     
Now, Because,                 Pressure=Force/Area
        Therefore,                     Force=Area x Pressure
                                                    F= 2 x 105 N
         Also,                  Work Done= Force x Displacement
      Therefore,             Work Done= (2 x 105) x 1=2 x 105 J.


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Answer 2

Answer:

4.10^5

Explanation:

Calculate work done as PV