P11.71.) Show thatĭ y d x = tan θ − ( n 2 2 2 / A 2 R h 43 κ 2 ) 1 − \frac\right) θ ( θ ∼ 1 ∘ ). Both are elastic, but both are a great deal stiffer than air. The channel bottom makes an angle θ \theta θ with the horizontal, and y y y is the vertical fluid depth. Speed of Sound Equation: v s 643.855 x (T/273.15) 0. The speed of sound in water was first measured by Daniel Colladon, a Swiss physicist, in 1826.
Consider the flow down a prismatic channel having a trapezoidal cross-section of base width b b b and top width b + 2 y b+2 y b + 2 y cos θ cot ϕ \cos \theta \cot \phi cos θ cot ϕ. Sound can travel through most materials - the most commonly known being air (gas), water (liquid) and steel (solid). A more recent value for the speed of sound, 331.45 metres per second (1,087.4 feet per second), was obtained in 1942 it was amended in 1986 to 331.29 metres per second at 0 C (1,086.9 feet per second at 32 F).
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