Engineering, 20.08.2019 18:20 isabellapayton2
Exposed ceiling beams are popular in many modern houses. however, because they are exposed, their ignition in the event of a fire is of concern. consider a 15 cm by 15 cm yellow pine beam, initially at 25°c, attached to a ceiling, thus insulat- ing the base. the three other sides are exposed to fire at 600°c with a combined convective/radiative heat transfer coefficient of 50 w/m2.k. determine the beam's maximum temperature 5 min after fire starts.
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
During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false
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Engineering, 04.07.2019 18:10
Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges
Answers: 1
Engineering, 04.07.2019 18:20
Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis
Answers: 1
Exposed ceiling beams are popular in many modern houses. however, because they are exposed, their ig...
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