Chapter 2.6, Problem 10ES

Examples: Solve the following differential equation using Laplace transform (e) ty"-ty+y=0 with y(0) = 0, and y'(0) = 1

Examples: Solve the following differential equation using Laplace transform (a) y" +2y+y=t with y(0) = 0, and y'(0) = 1

Temperature for Sudbury (degrees Celsius) 3. The following table gives the mean monthly temperatures for Sudbury, Ontario and Windsor, Ontario. Each month is represented by the day of the year in the middle of the month. Month Day of Year Temperature for Windsor (degrees Celsius) January 15 -13.7 -4.7 February 45 -11.9 -3.8 March 75 -5.9 2.3 April 106 3.0 8.7 May 136 10.6 14.6 June 167 15.8 20.2 July 197 18.9 22.6 August 228 17.4 22.0 September 259 12.2 17.9 October 289 6.2 11.5 November 320 -1.2 4.8 December 350 -10.1 -1.2 a) Create a scatter plot of temperature vs. day of the year for each city. b) Draw the curve of best fit for each graph. c) Use your graphs to estimate when the temperature increases fastest, for each set of temperature data. Explain how you determined these values. d) Use your graphs to estimate the rate at which the temperature is increasing at the two times from question 3. e) Determine an equation of a sinusoidal function to model the data for each city