Engineering, 05.11.2019 22:31, KarrieShea42
A10 cm x 10 cm circuit board dissipating 10 w of power uniformly is cooled by air, which approaches the circuit board at 15°c with a velocity of 4 m/s. disregarding any heat transfer from the back surface of the board, determine the surface temperature of the electronic components at the end of the board. determine the surface temperature of the electronic components (a) at the leading edge and (b) at the end of the board. assume the flow to be turbulent since the electronic components are expected to act as turbulators. assume a film temperature of 27°c.
Answers: 3
Engineering, 04.07.2019 18:10, salazjlove
Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation
Answers: 1
Engineering, 04.07.2019 18:20, cristykianpour
Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?
Answers: 2
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