Engineering, 05.10.2019 13:30 laurieburgess804
Consider a long, slender copper rod of diameter d = 1 cm and thermal conductivity k = 380 w/(m • °c), with one end thermally attached to a wall at 200°c. heat is dissipated from the rod by convection with a heat transfer coefficient h^ = 15 w/(m2 • °c). determine the heat transfer rate from the rod into the surrounding air at 7^ = 30°c.
Answers: 3
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.
Answers: 2
Engineering, 04.07.2019 18:10
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
Engineering, 04.07.2019 18:10
Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?
Answers: 3
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
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Consider a long, slender copper rod of diameter d = 1 cm and thermal conductivity k = 380 w/(m • °c)...
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