Water flows upward in a 6 cm-diameter pipe at a velocity of …

Water flows upward in a 6 cm-diameter pipe at a velocity of 4 m/s. The pipe length between points (1) and (2) is 5 m, and point (2) is 3 m higher than point (1). A mercury manometer connected between points (1) and (2) shows a reading of: h=225 mmwith pressure at point (1)  higher than at point (2). Given:   γHg=133,100 N/m3,γw=9,790 N/m3 Determine the head loss hf in meters. hint: use Bernoulli equation to calculate pressure drop then calculate the head losses.

Water flows from a reservoir through a cast iron pipe and a…

Water flows from a reservoir through a cast iron pipe and a turbine, then exits to the atmosphere. Given: Pipe length: L=125 mL = 125\ \text{m} Diameter: D=5 cmD = 5\ \text{cm} Elevation difference: Δz= 31 m Flow rate: Q=0.004 m3/sQ = 0.004\ \text{m}^3/\text{s} Fluid properties (water at 20∘C20^\circ C: ρ=998 kg/m3 ,    μ=0.001 kg/(m.s)   Cast iron roughness: ε=0.26 mm,f≈0.0316\varepsilon = 0.26\ \text{mm}, \quad f \approx 0.0316 What is the power extracted by the turbine (W)? Please extract the required minor losses K value from the figure and tables to solve the problem.   

Another sign stimulus, of course, is sound. A male bird’s so…

Another sign stimulus, of course, is sound. A male bird’s song attracts females and repels competitors. Thus, it acts as a signal to birds of the same species. Male grasshoppers also attract females with a song. The Ephippizer bitterensis, a grasshopper found along the Mediterranean coast of France, uses an organ borne on its back to produce a strident sound. Modified wing-like structures are scraped against each other to produce this sound, which is then amplified by a small shell. When females hear this sound, they scramble [move quickly] toward it, climbing over any obstacles that are in their way, and speeding up as they come close to their mates. Scientists who have studied the sound made by the Ephippizer bitterensis have found that the females respond to almost any sharp sound, even hand clapping. Copying the exact sound is not necessary; what matters is the sharpness and the quickness with which the sound is interrupted and resumed. It can be inferred that a female grasshopper might be most attracted to