Physics, 24.09.2019 03:30 fluffyunicorn59803
Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are maintained at a temperature of 130°c. circular aluminum alloy 2024-t6 fins (k = 186 w/m⋅k) 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[infinity] = 25°c, with a heat transfer coefficient of 40 w/m2⋅k. determine the increase in heat transfer from the tube per meter of its length as a result of adding fins.
Answers: 2
Physics, 21.06.2019 22:30, tladitidimatso1783
A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?
Answers: 1
Physics, 22.06.2019 07:20, hardwick744
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are maint...
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