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3 years ago

Determine if the fluid is satisfied

Engineering

1 answer:

guapka [62]3 years ago

8 0

Is there a picture or something?

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A rectangular channel 3-m-wide carries 12 m^3/s at a depth of 90cm. Is the flow subcritical or supercritical? For the same flowr

hram777 [196]

Answer:

Super critical

1.2 m

Explanation:

Q = Flow rate = $12\ \text{m}^3/\text{s}$

w = Width = 3 m

d = Depth = 90 cm = 0.9 m

A = Area = wd

v = Velocity

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

$Q=Av\\\Rightarrow v=\dfrac{Q}{wd}\\\Rightarrow v=\dfrac{12}{3\times 0.9}\\\Rightarrow v=4.44\ \text{m/s}$

Froude number is given by

$Fr=\dfrac{v}{\sqrt{gd}}\\\Rightarrow Fr=\dfrac{4.44}{\sqrt{9.81\times 0.9}}\\\Rightarrow F_r=1.5$

Since $F_r>1$ the flow is super critical.

Flow is critical when $Fr=1$

Depth is given by

$d=(\dfrac{Q^2}{gw^2})^{\dfrac{1}{3}}\\\Rightarrow d=(\dfrac{12^2}{9.81\times 3^2})^{\dfrac{1}{3}}\\\Rightarrow d=1.2\ \text{m}$

The depth of the channel will be 1.2 m for critical flow.

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3 years ago

When you park on a hill,the direction your __are pointed determines which direction your car will roll if the breaks fail

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Answer:

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Explanation:

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3 years ago

The speed of ac motors is primarily<br>determined by which two factors?<br>

maw [93]

The two factors used to determine the speed of ac motors are the frequency of the power supply and the number of poles in the motor winding.

Explanation:

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3 years ago

Which of the following uses technology that converts echoes that bounce off the tissues and organs of the body into a visual ima

eduard

Answer:

the second one

Explanation:

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3 years ago

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When inspecting tires, what should you look for?

givi [52]