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Find the steady-state temperature distribution in the plate of Problem 10 if two adjacent sides are at
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Mathematical Methods in the Physical Sciences
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- Two tanks are connected as in Figure 1.6. Tank 1 initially contains 20 pounds of salt dissolved in 100 gallons of brine. Tank 2 initially contains 150 gallons of brine in which 90 pounds of salt are dissolved. At time zero, a brine solution containing 1/2 pound of salt per gallon is added to tank 1 at the rate of 5 gallons per minute. Tank 1 has an output that discharges brine into tank 2 at the rate of 5 gallons per minute, and tank 2 also has an output of 5 gallons per minute. Deter- mine the amount of salt in each tank at any time. Also, determine when the concentration of salt in tank 2 is a minimum and how much salt is in the tank at that time. Hint: Solve for the amount of salt in tank 1 at time t and use this solution to help determine the amount in tank 2. 5 gal/min: 1/2 Ib'gal 5 gal'min Tank 1 Tank 2 5 gal'minarrow_forward2A.16 Please refer to the attached image for my question. Please show ALL your work. Thank you!arrow_forwardTwo tanks are connected as in Figure 1.6. Tank 1 initially contains 20 pounds of salt dissolved in 100 gallons of brine. Tank 2 initially contains 150 gallons of brine in which 90 pounds of salt are dissolved. At time zero, a brine solution containing 1/2 pound of salt per gallon is added to tank I at the rate of 5 gallons per minute, Tank 1 has an output that discharges brine into tank 2 at the rate of 5 gallons per minute, and tank 2 also has an output of 5 gallons per minute. Deter- mine the amount of salt in each tank at any time. Also, determine when the concentration of salt in tank 2 is a minimum and how much salt is in the tank at that time. Hint: Solve for the amount of salt in tank 1 at time t and use this solution to help determine the amount in tank 2. S prl min: 12 Ih gel S gil tain Tauk pal minarrow_forward
- When a forensic expert determines time of death, they often have additional information besides body temperature. Suppose a coroner finds that the person who was murdered had an infection that probably raised the core body temperature to around 102 degrees. Using the same cooling constant, ambient room temperature, and temperature data as in problem 1, make a new estimate for the time of death. Again, write your answer as a time, not just as ? minutes. A(Ambient temp)=68 B(temp)=85.9 K(cooling constant)=0.183702arrow_forward3. It is a cold winter morning when the temperature in your car falls to 10° F. At 8 AM you carelessly leave your trusty TI calculator in your car, not realizing that temperatures below freezing, 32° F, can seriously damage it. Your calculator was initially at a temperature of 49° F. You run back to your car at 9:05 AM to perform an urgent calculation, at which time you estimate the temperature of your calculator to be 40° F. Thinking it is OK, you again leave your calculator in the car. Assuming Newton's Law of Cooling applies, at what time (to the nearest minute) must you get back to rescue your calculator from potential damage? Setup and solve the appropriate DE.arrow_forwardProblem 3. A driver on a desert road discovers a hole in the gas tank leaking gas at the constant rate of 4 gallons per hour. This driver, having no way to plug the hole, decides to drive for as long as the gas supply allows. The gauge reading indicates the tank is three-fourths full, which means that the tank contains 14 gallons. The car consumes gas at the rate of 18 miles per gallon at 40 mph. For each 5 mph below 40 mph add one-half mile per gallon to this rate; for each 5 mph above 40 mph, subtract one mile per gallon from this rate. If the driver chooses the best constant speed in order to get the maximum driving distance, find the maximum distance that the 14 gallons will allow. Assume that gas consumption is a continuous function of speed.arrow_forward
- 3. (Section 2.5, Problem 9) Professor Snarf always has a cup of coffee before his 8:00 A.M. class. Suppose the temperature of the coffee is 200° F when it is freshly poured at 7:30 A.M. and 15 minutes later it cools to 120° F in a room whose temperature is 70° F. However, Professor Snarf never drinks his coffee until it cools to 90° F. When will Professor Snarf be able to drink his coffee?arrow_forwardPlease solve this ASAP.arrow_forward2) The Nikkei 225 index is a stock market index for the Tokyo Stock Exchange. The Nikkei 225 index for the period 1990-2010 can be modeled by V (t) = 23,500e-0.0381t where t is the number of years after 1990. Determine how many years after 1990 the Nikkei 225 index reached $20,000.arrow_forward
- QUESTION 1: (i) In a child daycare centre, 1 5 of the children in there have blood type A+ and the rest are blood type O. 1 3 of the children with the blood type A+ are boys. Given that the number of boys who have blood type A+ is 2. Calculate the numbers of children with blood type O. (ii) A fish was at the river-bed at a certain time. After 5 minutes, the water level of the river rose up 2.4 cm and the water level of the river rose up again 3 1 2 cm after 4 minutes. At the moment, the fish was at 14.6 cm from the river-bed and 162 cm below water level of the river. Calculate the original height, in cm, of the water level of the river.arrow_forwardIf P(A) = 0.53, P(B) = 0.3, and P(A and B) = 0.15, then P(A/B) = (Please round to two decimal places.)arrow_forwardQuestion 3. measured at 140°C. 3 minutes later its temperature is 70° C. When a cake is removed from an oven, its temperature is a) Give the Initial Value Problem that describes the model and solve it. b) How long will it take for the cake to get 50° C if initially the room temperature was 40°C?arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageLinear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning