If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about
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The speed and pressure at another end will be 9 m/sec and -31500 pascals.
<h3>What is gauge pressure?</h3>The difference between absolute pressure and atmospheric pressure is known as gauge pressure. Relative pressure is another name for gauge pressure.
Given data in problem is;
For horizontal pipe, Z₁=Z₂
Pressure at end 1, P₁ = 4500Pa
Speed at end 1, V₁ = 3 m/sec
Speed at end 2, V₂ = ? m/sec
Area of cross-section at end 1,A₁ =A
Area of cross-section at end 1,A₂ = A/3
From the continuity equation;
A₁V₁=A₂V₂
A× 3 = (A/3)×V₂
V₂ = 9 m/sec
From Bernoulli's equation;
Hence the speed and pressure at another end will be 9 m/sec and -31500 pascals.
To learn more about the gauge pressure, refer to the link;
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