Question

In: Advanced Math

(1 point) A tank is filled with 1000 liters of pure water. Brine containing 0.05 kg...

(1 point) A tank is filled with 1000 liters of pure water. Brine containing 0.05 kg of salt per liter enters the tank at 6 liters per minute. Another brine solution containing 0.07 kg of salt per liter enters the tank at 9 liters per minute. The contents of the tank are kept thoroughly mixed and the drains from the tank at 15 liters per minute. A. Determine the differential equation which describes this system. Let S(t) denote the number of kg of salt in the tank after t minutes.

A) dS/dt = ?

B) Solve the differential equation for S(t).

Solutions

Expert Solution


Related Solutions

A tank containing 100 kg of a 60% brine (60% salt) at 33°C is filled with...
A tank containing 100 kg of a 60% brine (60% salt) at 33°C is filled with a 10% salt solution (28°C) at the rate of 10 kg/min. The barometric pressure is 101.5 KPa. Solution is removed from the tank at the rate of 15 kg/min. Find the kilograms of salt in the tank after 10 min
A tank is filled to capacity with 400 gallons water containing 30 lbs of salt. Brine...
A tank is filled to capacity with 400 gallons water containing 30 lbs of salt. Brine containing 2 lbs of salt per gallon is pumped into the tank at a rate of 3 gallons per minute. The well mixed solution is pumped out at rate of 3.5 gallons per minute. Determine the differential equation of the model and solve for an equation relating amount of salt in tank at time t. Determine the time until the tank is empty.
A tank contains 9,000 L of brine with 11 kg of dissolved salt. Pure water enters...
A tank contains 9,000 L of brine with 11 kg of dissolved salt. Pure water enters the tank at a rate of 90 L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. (a) How much salt is in the tank after t minutes? (b) How much salt is in the tank after 10 minutes? (Round your answer to one decimal place.)
A tank initially contains 80gal of pure water. Brine containing 2lb of salt per gallon enters...
A tank initially contains 80gal of pure water. Brine containing 2lb of salt per gallon enters the tank at 2gal/min, and the (perfectly mixed) solution leaves the tank at 3 gal/min. Thus the tank is empty after exactly 80 min. (A) Find the amount of salt in the tank after t minutes. (b) What is the maximum amount of salt ever in the tank?
A tank contains 60 kg of salt and 1000 L of water. Pure water enters a...
A tank contains 60 kg of salt and 1000 L of water. Pure water enters a tank at the rate 12 L/min. The solution is mixed and drains from the tank at the rate 6 L/min. (a) What is the amount of salt in the tank initially? amount =  (kg) (b) Find the amount of salt in the tank after 3 hours. amount =   (kg) (c) Find the concentration of salt in the solution in the tank as time approaches infinity. (Assume...
Consider a large tank holding 50 gal of pure water into which a brine solution of...
Consider a large tank holding 50 gal of pure water into which a brine solution of salt begins to flow at a constant rate of 6 gal/min. the brine leaves the tank at a rate of 5 gal/min. If the concentration of salt in the brine entering the tank is 0.1 lbs per gallon, determine the function X that will determine the amount of brine in the tank at any time t.
A pump lifts 1000 (liters) of water from ground to a tank on the roof of...
A pump lifts 1000 (liters) of water from ground to a tank on the roof of a building 100 (m) high. What is the potential energy in the water? [ 1 (liter) = 1000 cm3 ]. Show all your steps to the solution. A skier is coming downhill. At one point she is 50 (m) above the bottom of the hill and moving at 20 (m/s). What is her speed as she reaches the bottom of the hill? 22.3 (m/s)...
A farmer has a mixing tank of capacity 1200 liters which she half-filled with pure, fresh...
A farmer has a mixing tank of capacity 1200 liters which she half-filled with pure, fresh water. She pumps into the tank a concentrated liquid fertilizer (CLF) at rate 3 liters/minute, containing 1/3 ∼ 0.333 kg/liter of nitrate (a salt of nitric acid). In addition, she pours the dry powder fertilizer (DPF, the same chemical as a soluble powder) at rate 1/12 = 0.08333 kg/min in the tank; her aim is to get a right solution concentration 0.12kg/liter for the...
Consider a tank containing at time t = 0, 100 gallons of brine. Assume that water...
Consider a tank containing at time t = 0, 100 gallons of brine. Assume that water containing 1/4 lb of salt per gallon is entering the tank at a rate of 3 gallons per minute, and that the well stirred solution is leaving the tank at the same rate. Find a differential equation for the amount of salt A(t) in the tank at time t > 0 **PLEASE SHOW ALL STEPS CLEARLY SINCE I REALLY WANT TO UNDERSTAND THE WHOLE...
Consider a tank containing at time t = 0, 100 gallons of brine. Assume that water...
Consider a tank containing at time t = 0, 100 gallons of brine. Assume that water containing 1/4 lb of salt per gallon is entering the tank at a rate of 3 gallons per minute, and that the well stirred solution is leaving the tank at the same rate. Find a differential equation for the amount of salt A(t) in the tank at time t > 0 **PLEASE SHOW ALL STEPS CLEARLY SINCE I REALLY WANT TO UNDERSTAND THE WHOLE...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT