Engineering, 07.03.2020 00:12 jessezarate7129
5) A wire resistor of 1 mm diameter is in an ambient with T[infinity]= 33°C and h= 500 W/m2·K. The electrical resistance per unit length of wire is 0.01 Ω/m. What is the steady-state temperature of the wire when a current of 97 A passes through it? How long does it takes to reach a temperature that is within 1°C of the steady-state value? The properties of the wire are rho= 8000 kg/m3, c= 500 J/kg·K, and k= 20 W/m·K.
Answers: 1
Engineering, 03.07.2019 14:10
Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
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Engineering, 04.07.2019 18:10
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
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Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 18:20
Aheavily insulated piston-cylinder device contains 0.02 m3 of steam at 300 kpa and 200 °c. 1.2 mpa. d this process. team is now compressed in a reversible manner to a pressure of etermine the entropy change and the work done on the steam during this process
Answers: 1
5) A wire resistor of 1 mm diameter is in an ambient with T[infinity]= 33°C and h= 500 W/m2·K. The e...
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