Physics, 03.12.2019 01:31, meababy2009ow9ewa
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, ηf = 0.97) 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 trans- ferred 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: 1
Physics, 22.06.2019 03:00, thebigman7993
The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f
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Physics, 22.06.2019 19:30, CalCDanG
Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.
Answers: 3
Physics, 23.06.2019 04:31, deaishaajennings123
Difference between natural and artifical magnet
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Steam in a heating system flows through tubes whose outer diameter is 5 cm and whose walls are maint...