Question

Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are maintained at a temperature of 180c. Circular aluminum alloy 2024-t6 fins (k 186 w/m c) of outer diameter 6 cm and constant thickness 1 mm are attached to the tube. The space between the fins is 3 mm, and thus there are 250 fins per meter length of the tube. Heat is transferred to the surrounding air at t 25c,

Answer 1

Represent 3,_2,4,_4 on a number line