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Using estimates of rainfall, evaporation, and water consumption, the town engineer developed the following model of the water volume in the reservoir as a function of time
V(t) = 109 + 108(1 - e-t/100) - rt
where V is the water volume in liters, t is time in days, and r is the town's consumption rate in liters per day. Write two user-defined functions. The first function should define the function V(t) for use with the fzero function. The second function should use fzero to compute how long it will take for the water volume to decrease to x percent of its initial value of 109 L. The inputs to the second function should be x and r. Test your functions for the case where x = 50 percent and r = 107 L/day.
Transportation network, A power generator at a dam can send 300 megawatts to substation 1, can send 200 megawatts to substation 2, and can send 250 megawatts to substation 2
The tank has an inner diameter of 1.5 m and a wall thickness of 18 mm. If the pressure in the tank is p=1.20MPa, determine the force in the 16 bolts that are used to attach the cap to the tank. Also, specify the state of stress in the wall of the ..
Determine the minimum required diameter for this machine member based on direct, compressive stress. The member is to be made of gray cast iron. Use a factor of safety of 6.0 against compression failure.
Determine the size PFR and CFSTR's required to treat 4000 m3/day of sewage with a BOD of 200 mg/L. State law requires a minimum of 92% removal and BOD follows first order kinetics.
Design a column base plate for a W10 x 33 column supporting a service dead load of 20 kips and a service live load of 50 kips. The column is supported by a 12-inch x 12-inch concrete pier. Use A36 steel and f 'c = 3 ksi. Answer 12 x 12 x 5/8
If water at 70 degrees C (row=1.94 slugs/ft^3, vapor pressue= 0.363psia) is used in a simple barometer what is the height of the column of water if the atmospheric pressure is 15 psia
A slurry containing 20 percent by weight of limestone (CaCO3) is processes to separate pure dry limestone from water. If feed rate is 2000kg/h, how much CaCO3 is produced per hour?
Do the administrators of server systems still have to be concerned about, and take further countermeasures against DoS attacks, if so, what types of attacks can still occur, and what measures can be taken to reduce their impact?
You open a 16 oz (1 pint) bottle of a carbonated soft drink that has a temperature of 5°C, then you get distracted and forget to drink it. You come back quite some time later and find that it has gone "flat," and that it has gotten warm (20°C).
Assume that an egg can be hatched only in the week after it is laid. Otherwise it must be saved and sold for 10 cents. Assume that there are no eggs available for hatching in the first week.
A 6-inch diameter steel sphere (sg = 8.0) is released in a large tank of oil (sg = 0.86). The terminal velocity of the sphere is measured at 13.5 ft/s. Calculate the absolute viscosity of the oil.
The initial concentration of carbon in the metal is 0.1wt%. We first do an experiment by applying a concentration of 5%wt of carbon at the surface of a similar slab and maintaining the system at 900 K for an hour.
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