Question 5 values are, Q=190, k=380, L=7, r=0.17

(a) Find an expression for angular acceleration, a. (b) Determine the first time t for a = 0. 5. The temperature 0 of a pipe with inner radius r is given by O(r) = - Q In(r), 27kL where Q is the heat transfer rate, L is the length of the pipe, and & is the thermal conductivity. do (a) Find the rate of change of temperature, as a function of radius. (b) Find the value of the rate of change of temperature for r = R. 6. Integrate by substitution: (a) JeriBar, (b) [ sin(Cr + D)dr