Air flows through a circular duct with a diameter of 8 cm at room temperature. the gauge pressure readings for the total pressure and the static pressure are 200 pa and 70 pa, respectively. assume that this system is in a room that is at a pressure of 100,000 pa and a temperature that is 300k. a. what is the velocity of the air in this 8 cm diameter duct. give your answer in m/s. b. furthermore downstream, the diameter of the duct decreases to 4 cm. what is the new velocity of the air when the diameter is 4 cm? give your answer in m/s.

V=14.71 m/s

Explanation:

Given that

Diameter d= 8 cm

Total pressure = 200 Pa  (gauge)

Static pressure = 70 Pa  (gauge)

We know that

Total pressure =Static pressure + Dynamic pressure

Density of air at room temperature

Now by putting the values

V=14.71 m/s

When diameter is reduced to 4 cm

For same flow rate

We know that

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3.russians

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5. african americans

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answer:

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explanation: