3. A tank contains 100 gal of brine in which 50 lb of salt is dissolved. Brine containing 2 lb/gal of salt runsinto the tank at the rate of 3 gal/min, and the mixture, assumed to be kept uniform by stirring, runs outat 2 gal/min. How much salt is in the tank at the end of 30 min?4. What is the equation of a family of curves orthogonal to 2r + y? = c?5. A resistance R = 10 ohms and capacitance C = 4 millifarad are connected in series with a direct currentelement V = 50 volts. Assume that when the switch is closed, the charge on the capacitor is 0.02 coulomb.Find the initial current.

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Answered: 3. A tank contains 100 gal of brine in…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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3. An automobile tire contains 3730 cu.in. of air at 32 psig and 80°F. (a) What mass of air is in the tire? (b) In operation, the air temperature increases to 145°F. If the tire is inflexible, what is the resulting percentage increase in the gage pressure? (c) What mass of the 145°F air must be bled off to reduce the pressure back to its original value?
In the tank of 100 liters of brine containing 50kg totally dissolved salt. Pure water is allowed to run into the tank at the rate of 3 liters per minute. Brine runs out of the tank at rate of 2 liters minute. The instantaneous concentration in the tank is kept uniform by stirring. How much salt is in the tank at the end of 2.4 hour?
A tank contains 1000 gal of brine in which 500 lb of salt are dissolved. Fresh water runs into the tank at the rate of 10 gal / min, and the mixture is kept uniform by stirring, runs out at the same rate. How long will it be before only 50 lb of salt are left in the tank?
Initially tank I and tank II each contains 100 gal of brine, tank I having 200 lb salt and tank II 50 lb of salt in solution. Brine runs at 2 gal/min from tank I to tank II through one pipe and at 3 gal/min from tank II to I through another pipe. The brine is kept well stirred. How much salt (in lb) will be in the second tank after 50 min?
AN AUTOMOBILE TIRE CONTAINS 3730 cu. in. OF AIR AT 32 psig AND 800f. (a) What mass of air is in the tire? (b) In operation, the air temperature increases to 1450F. If the tire is inflexible, what is the resulting percentage increase in gage pressure? ( c) What mass of the 1450F air must be bled off to reduce the pressure back to its original value?
Solve with the correct units 7. Two liquids of different densities(p1=1500 kg/m3 and p2=500 kg/m3) are poured together into a 100-liter tank, filling it. If the resulting density of the mixture is 500 kg/m3,find the respective quantities of liquids used. Also find the weight of the mixture.
Gas is bled from a tank. Neglecting heat transfer between the gas and the tank, show that mass and energy balances produce the differential equation: dU / H'-U = dm / m Here, U and m refer to the gas remaining in the tank; H' is the specific enthaly of the gas leaving the tank. Under what conditions can one assume H'=H?
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. At which point is the water pressure smaller? 1.) Point B 2.) It is the same at both points. 3.) Point A 4.) Cannot be determined from the information given.
A 300-gal capacity tank contains a solution of 200 gals of water and 50 lbs of salt. A solution containing 3 lbs of salt per gallon is allowed to flow into the tank at the rate of 4 gal/min. The mixture flows from the tank at the rate of 2 gal/min. How many pounds of salt are in the tank at the end of 30 min? When does the tank start to overflow? How much salt is in the tank at the end of 60 min?
A tank contains 450 liters of brine made by dissolving 30 kg of salt in water. Saltwater containing 1 kg of salt per 9 liters runs in at the rate of 9 liters per minute, and the mixture kept uniform by stirring, runs out at the rate of 13.5 liters per minute. Find the amount of salt in the tank at the end of 1 hour.
11. 100 g of water are mixed with 150 g of alcohol (). What is the specific gravity of the resulting mixtures, assuming the fluids mixed completely.
In general term, ______________ is the tendency of one fluid to spread on to a solid surface in the presence of other fluid a. Relative Density b. Porosity c. Permeability d. Viscosity e. Wettabilty

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