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Eduardwww [97]
3 years ago
11

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 C water to flow th

rough it at an average speed of 4.0 m/s?
Physics
1 answer:
Kaylis [27]3 years ago
7 0

Answer : The pressure difference required is, 1.792\times 10^5Pa

Explanation : Given,

Length of tube = 2.0 m

Diameter of tube = 1.0 mm = 1.0 × 10⁻³

Average speed of water = 4.0 m/s

Viscosity of water at 40°C = 0.7 × 10⁻³

The expression used for pressure difference is:

\Delta P=8\pi \eta \frac{L\nu_{avg}}{A}

where,

\Delta P = pressure difference

\eta = viscosity of water = 0.7 × 10⁻³

L = length of tube = 2.0 m

A = area of tube = \pi r^2=\pi (\frac{Diameter}{2})^2=3.14\times (\frac{1.0\times 10^{-3}m}{2})^2=7.85\times 10^{-7}m^2

\nu_{avg} = average speed of water = 4.0 m/s

Now put all the given values in the above expression, we get:

\Delta P=8\times 3.14\times 0.7\times 10^{-3}\frac{2.0\times 4.0}{7.85\times 10^{-7}}

\Delta P=179200Pa=1.792\times 10^5Pa

Thus, the pressure difference required is, 1.792\times 10^5Pa

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Which two questions can be used to identify criteria for how successful the design of an efficient high altitude drone is?
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2 years ago
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceler
kirza4 [7]

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a.) 2.66 seconds for 79.2 km/h and 1.82 seconds for 47.8 km/h

b.)-4.13 m/s2 for 79.2 km/h and -3.63 m/s2 for 47.8 km/h

Explanation:

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5 0
3 years ago
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