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Lift and drag forces (3)
As a means of eliminating the wave resistance to a high-speed boat, the hulls are supported well above the water by streamlined struts connected to horizontal hydrofoils. If the hydrofoil has the characteristics plotted in Figure 6.8A, what must be its dimensions to support the load of a 3,200 kg boat at the most favourable lift-drag ratio when the high-speed boat is cruising at 35 knots?
Figure 6.8A
Using the liquid-vapor equilibrium diagram of an oxygen-nitrogen mixture, determine the composition of each phase at 80 K and 100 kPa.
Suppose the utility encourages its customers to replace their 75-W incandescents with 18-W compact fluorescent lamps (CFL) that produce the same amount of light. Over the 10,000-hr lifetime of a single CFL,
A thermal reservoir (T=308K) is brought in contact with the tank, transferring enough heat to the tank to raise the pressure inside to 4 bar. Calculate the entropy changes of the refrigerant and the thermal reservoir
The specific storage of a 45-m thick confined aquifer is 3.0 X 10^-5 m^-1. How much water would the aquifer produce if the piezometric surface is lowered by 10 m over an area of 1 km^2
The Pennsylvania north zone SPCS83 state plane coordinates of points A and B are as follows
Calculate the minimum flow rate (m^3/hr) of river water needed to acheive pre cooling hot, pasteurized liquid prodcut assuming that 10% heat is lost to the surroundings during exchange and that the water temp after cooling should not exceed 25 deg..
The hinge at A and the cable that attaches at points B and C support rigid bar ABC. Determine the reaction components at A and the tension in the cable.
Three reservoirs are connected by three pipes with hA = 100 f t, hB = 20 f t, hC = 0 f t, L1 = 1000 f t, L2 = 500 f t, L3 = 400 f t and D1 = D2 = D3 = 1 f t. Determine flow rate into or out of each reservoir if friction in each pipe is 0.02.
The tower crane is used to hoist the 2-Mg load upward at constant velocity. The 1.5-Mg jib BD , 0.5-Mg jib BC , and 6-Mg counterweight C have centers of mass at G1 , G2 , and G3 , respectively.
The price of oil in 2005 was $67 per barrel. "This priceis still lower than price of in 1981" says a government publication. If inflation has average 3.2% per year from 1981 to2005, what was the price per barrel of oil in 1981?
Circle the cases that are solvable using what we know in Statics (hence circle thosewhich are fixed and internally/externally determinate)\
What is the water content and liquidity index of the fines in compacted mass?A civil engineer used a 30-m tape in measuring an inclined distance. The measured length on the slope was recorded to be 459.20 m long.
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