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A tank with a 3m diameter has an 8 cm orifice at the bottom. The tank is currently filled with water to a height of 2.5m above the orifice. If the orifice is opened, how long will it take until the height is 1 m. above the orifice? Assume that the water surface lowers so slowly that Bernoulli’s equation gives an accurate value of the water velocity leaving the orifice. (369 s = 6.15 min)
what is the force P to move the cabinet if a) caster A and B are locked b) B is locked A is free to move c) A is locked B is free to move p is applied from the left side pushing right. the width of the cabinet from caster a to b is 24 inches.
A one tenth scale model of a soap box derby car is tested in a wind tunnel. The air speed in the wind tunnel is 70m/s, the air drag on the model car is 240 N, and the air temperature and pressure are identical to those expected
The coal may either be moved by train from the mine to power plants near where the power is used, or the coal could be combusted near the mine mouth to generate electricity and the electricity could be transmitted over long distances to the users.
a vertical curve is formed when a rural highway passes under a bridge joining a -8 grade to the horizontal grade
Write an M-file to calculate the factorial function of N!, as defined by: N!=1 N=0 N!=N*(N-1)*(N-2)*...*3*2*1 N>0 The MATLAB code to calculate N factorial for positive value of N would be n_factorial=1
An ideal Sterling cycle operates between thermal energy reservoirs at 27 degrees C and 527 degrees C. The maximum cycle pressure is 2000 kPa.
One method of removing phosphate from wastewater effluents is to precipitate it with aluminum sulfate. A plausible stoichiometry (but not exact because aluminum and phosphate can form many different chemical materials) is
An investor has invested $250,000 in a new rental property. Her estimated annual costas are $6,000 and annual revenues are $20,000. What rate of return per year will the investor make over a 30-year period ignoring the salvage value
A big municipal utility district is considering two large-scale conduits. The first includes construction of a steel pipeline at a cost of $200 million.
A soil proposed for a compacted fill contains 38% fines and 62% coarse materials by dry weight. when the coars fraction has w=2.0%, its affinity of water is completely satisfied( that is,it is saturated but surface dry).
A completely mixed aerated lagoon (batch reactor) is to be used. How large must hte lagoon be to achieve a concentration of effluent that is 50 mg/L
The initial velocity of a 15-lb block is given as mv1=15i+15j (ft/s). A force defined by F=250i-250tj (lb) acts on the particle from time t=0 to time t=0.3 s for a total duration of 0.3 s. Determine the particle’s velocity at t=1 s. Neglect friction.
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