A nonmechanical water meter could utilize the Hall effect by applying a magnetic field across a metal pipe and measuring the Hall voltage produced. What is the average fluid velocity in m/s for a 4.25 cm diameter pipe, if a 0.575 T field across it creates a 60.0 mV Hall voltage?

The velocity is  

Explanation:

From the question we are told that  

   The diameter of the pipe is  

    The magnetic field is  

     The hall voltage is  

Generally the average fluid velocity is mathematically represented as

=>      

=>      

b

explanation:

okay i have so many questions. but the big one here is: um wt..f is this mess? ?