A horizontal tunnel tapers an Area of 75m² to 32m". flow rate of the air be if the pressure difference between the tapers is 15kPa? Assume there are no frictional losses and that the density of air is 1.2kg/m². Some of the flow is diverted from the wind tunnel into a venturi which tapers from diameter of 50mm to 25mm. Given that the head of pressure 78mm, calculate the flow rate.

This solution does not make sense as it does not look lik you used  the correct formula for range.

Could you possibly include a picture of the written solution, the transcription gets a bit confusing! Thank you :)

Using your values for 7, calculate the average period Ibar (I) and its standard error. How does the error on the average period /bar (T) compares to the errors on the periods, I? What can you do to reduce the uncertainty on /bar (T)? What can you do to reduce the uncertainty on 7 ? Peried Trial T AT 4 141 $ 10.69 +α-0.5 2 10.60 + or -0.5 2 10.40 +α-0.5 10.43 +α-0.5 S 10.37 + or -0.5 Using your values for T, calculate the average period 7 and its standard error How does the error on the garage period compares to the errors on the periods, 7? What can you do to reduce the uncertainty on 7? What can you do to reduce the uncertainty on T7