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diff --git a/2873/CH4/EX4.3/Ex4_3.sce b/2873/CH4/EX4.3/Ex4_3.sce
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+// Display mode
+mode(0);
+// Display warning for floating point exception
+ieee(1);
+clear;
+clc;
+disp("Engineering Thermodynamics by Onkar Singh Chapter 4 Example 3")
+T1=315;//temperature of reservoir 1 in K
+T2=277;//temperature of reservoir 2 in K
+Q2=2;//heat extracted in KJ/s
+disp("from thermodynamic temperature scale")
+disp("Q1/Q2=T1/T2")
+disp("so Q1=Q2*(T1/T2)in KJ/s")
+Q1=Q2*(T1/T2)
+disp("power/work input required(W)=Q1-Q2 in KJ/s ")
+W=Q1-Q2
+disp("power required for driving refrigerator=W in KW")
+W