Why is a rotameter called a drag meter

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1. What is a sonic nozzle? How is it used? What are its advantages and disadvantages?

2. Why is a rotameter called a drag meter? Could it also be called an area meter?

3. What is the utility of the hot-wire anemometer?

4. Distinguish among the shadowgraph, schlieren, and interferometer flow visualization techniques. What basic flow variable is measured in each technique?

Reference no: EM131344573

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