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posted by  idahoskeeter on 11/5/2009 6:48:48 PM  |  status: Live  |  Earned Karma: 25

i need the answer, im at my limit for submissions

Course Textbook Chapter Problem Needs by
Algebra Based Physics Physics (7th) by Cutnell, Johnson 22 4 11/5/2009 at 8:00:00 PM
Question Details:
The drawing shows a type of flow meter that can be used to measure the speed of blood in situations when a blood vessel is sufficiently exposed (e.g., during surgery). Blood is conductive enough that it can be treated as a moving conductor. When it flows perpendicularly with respect to a magnetic field, as in the drawing, electrodes can be used to measure the small voltage that develops accross the vessel. Suppose the speed of the blood is 0.26 m/s and the diameter of the vessel is 5.6 mm. In a 0.57 T magnetic field what is the magnitude of the voltage that is measured with the electrodes in the drawing?

i did e=vBl and got (0.26 m/s)x(0.57)x(.0056)= 8.2992E-4 ; why is this not rightv
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posted by Nick9 on 11/7/2009 9:35:16 AM  |  status: Live
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Response Details:
  Given :
   B = 0.57 T
   l = 5.6 mm = 5.6 * 10-3 m
    v = 0.26 m/s
   As we know that
     ε = B i l
         = ( 0.57 T ) * ( 5.6 * 10-3 m ) ( 0.26 m/s )
          = 0.83 * 10-3  V
  I hope it helps you
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