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A fenced enclosure consists of a rectangle of length L and width 2R, and a semicircle of radius R, as shown in Figure P20. The enclosure is to be built to have an area A of 1600 ft^2. The cost of the fence is $40/ft for the curved portion and $30/ft for the straight sides. Use the min function to determine with a resolution of 0.01 ft the value of R and L required to minimize the total cost of the fence. Also compute the minimum cost.
a piston - cylinder device initially contains 0.1 m3 of nitrogen gas at 150 kpa and 130 degc. the nitrogen is now
(a) Find the angular velocity of link CD and the velocity of the pin relative to the slot in link CD. (b) Find the angular acceleration of link CD and the acceleration of the pin relative to the slot in link CD.
a bar of mild steel has a diameter of 75 mm and is placed inside a hollow aluminum cylinder of internal diameter 75 mm
a space is at a temperature of 75 f 24 c and the relative humidity is 45 percent. find a the partial pressures of the
determine the smallest allowable value of the coefficient of static friction between the collar and the rod if the collar is not to slide when a) a =15° b)a = 45°. Indicate for each case the direction of the impending motion.
two 10 inch gears are to be mounted 12 inches apart and have a velocity ratio of 51. find the pitch diameters and the
if the 1500-lb boom ab the 200-lb cage bcd and the 175-lb man have centers of gravity located at points g1 g2 and g3
What is differential levelling? list the procedure for carrying out a differential levelling exercise where one point is beyond the range of the instrement . 100 word limit
A horizontally oriented copper rod length of l=1m is rotated about avertical axis passing through its middle. what is number of rps at wich this rod ruptures?
What are the percentages of the total heat absorption taking place in the economizer, boiler drum and the superheater, respectively? Assume cp of air and water as 1.005 kJ/kg K and 4.2 kJ/kg K, respectively.
the wall of a cold storage consists of three layers- an outer layer of ordinary bricks 25 cm thick a middle layer of
If the unit can perform its function either in State 1 or 2, find the steady-state availability A for the device.
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