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Jerry Jäppinen
Design, tech, engineering and science. Head of Design and User Research.
Published
Course: Physics 3
Edited
Feb 18, 2022
Course: Physics 3
1.4: Water pipe
3.2: Linear fit3.4: Moving molecules
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d_1 = 2.7 * centi // m
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p_1 = 4 * pow(10, 5) // Pa
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y_1 = 0 // m
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d_2 = 1.7 * centi // m
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v_1 = 1.4 // m/s
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h = 4.1 // m
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y_2 = y_1 + h // m
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g = 9.81 // m/s²
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rho = 997 // kg/m³
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A_1 = pi * pow(d_1 / 2, 2) // m²
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A_2 = pi * pow(d_2 / 2, 2) // m²
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v_2 = v_1 * (A_1 / A_2) // m/s
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p_2 = solve(`p_1 - p_2 = (0.5 * rho * (v_2^2 - v_1^2)) + rho * g * (y_2 - y_1)`, 'p_2', {
g,
rho,
p_1,
v_1,
v_2,
y_1,
y_2
}) // Pa
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p_2 / ten(5) // 10^5 Pa
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