1 files changed, 23 insertions, 0 deletions
diff --git a/965/CH4/EX4.31/31.sci b/965/CH4/EX4.31/31.sci
new file mode 100644
index 000000000..5fbbc1621
--- /dev/null
+++ b/965/CH4/EX4.31/31.sci
@@ -0,0 +1,23 @@
+clc;
+clear all;
+disp("Time for cooling")
+L=20/1000;//m
+ti=150;// degree C
+ta=30;//degree C
+hw=100;// W/(m^2.C)
+ha=20;// W/(m^2.C)
+t=90;// degree C
+rho=8800;//kg/m^3
+c=400;// J/kg.C
+k=360;//W/(m.C)
+
+As=4*3.1416*R^2;
+Lc=L/2;//m
+Bi=h*Lc/k;
+
+C=120;
+tau=-rho*L*c*log((t-ta)/(ti-ta))/C
+disp("minutes",tau/60," time,  Tau =")
+
+
+