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A blue spruce pine tree has the shape of a triangle which is 15 cm off the ground. The triangle has a maximum diameter of 6 m and is 10 m tall. Estimate the drag on the tree if it is exposed to a 25 m=s wind. Use CD¼ 0.4 in your calculations.
the acceleration of a particle is defined by the relation a25-3x2 where a is expressed in ms2 and x in meters. the
The thermal efficiency of a heat engine is 40% and produces 100kW. Please determine the heat transfer rate to this engine and heat rejection rate to the surrounding.
The Prony brake shown in Figure 2 is commonly used in torque measurement. The rope is wound round the brake drum mounted onto the shaft. One end of the rope carries a dead load of weight W and the other end is attached to a spring balance
an ideal reheat rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000
A closed gas turbine unit uses neon as the working fluid. There are two stages of compression with inter cooling from 480kPa and 290K to a maximum pressure of 2.75MPa with an intermediate pressure of 1149kPa. The regenerator has an effectiveness of 6..
an ideal gas power cycle is executed within a closed piston-cylinder system and consists of three processes as follows1
a heat pump cycle operates between a geothemial reservoir and your house. the cycle requires 200 kw to operate with a
When a positron and an electron meet, they are both annihilated into pure energy. Calculate how much energy (in MeV) is released in this reaction assuming that each particle is moving at 50% the speed of light.
A piston-cylinder device initially contains 0.007m^3 of nitrogen gas at 130kPa and 120C. The nitrogen gas is now expanded polytropically to a state of 100 kPa and 100C. Determine the boundary work done during this process. I know I need to use the fo..
Water flows in a 0.15-m-diameter vertical pipe at a rate of 0.20 m3/s and a pressure of 580 kPa at an elevation of 25 m. Determine (a) velocity head at elevation of 20 m, (b) pressure head at elevation of 20 m, (c) velocity head at elevation of 55 m,..
saturated water at mean temperature 20 degc flows inside a 25-mm-idnbspcircular tube which is electrically heated to
what are the four basic families of shape-production processes? Cite one advantage and one limitation of each family.
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