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Question: having some difficulty with this question for my fluid mechanics...

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Question 1. A weir is to be constructed in a river that carries a discharge Q of 2m3/s (see next figure). A 1:20 scale model is used to determine the forces on the structure, and the model weir is placed on a laboratory open channel filled with oil (p 900 kg/m Please answer the following a) What flow discharge Q should be used in the model? b) If a force of 10 N is measured in the model weir, what force would be expected in the prototype? c) Downstream of the weir, the channel is piped and goes underground. If we want to study the friction on the pipe, can we extend the model and include the pipe? Briefly explain why or why not Weir
Having some difficulty with this question for my fluid Mechanics class, any help me would be appreciated.
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