Why should thermal contact resistance be of concern to engineers?
What will be an ideal response?
Thermal contact resistance inhibits good heat transfer, can mean a significant
change in temperature at a surface of conduction heat transfer, and can provide
a surface for potential corrosion.
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Asian astronomers ________.
A. devised ways to predict eclipses B. recorded the existence of sunspots C. kept detailed records of unusual celestial events D. All of these choices are correct.
The deviation of a lens from its ideal behavior is referred to as
A) spherical aberration. B) chromatic aberration. C) an aberration. D) achromatic aberration. E) None of the other choices is correct.
Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, the
lifetime of the battery (Neglect the battery’s internal resistance.) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
The spectrum of a(n) ____________________ consists of a continuous spectrum and a few highly redshifted emission lines of due to hydrogen
Fill in the blank(s) with correct word