How does surface tension affect heat pipe performance?
What will be an ideal response?
Surface tension is not so crucial for heat pipes intended to operate vertically.
Horizontal installations benefit by surface tension with an internal wick, but for
vertical installations and operations, surface tensions play a crucial role in
returning a condensate to the heat source.
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A proton, moving in a uniform magnetic field, moves in a circle perpendicular to the field. If the proton's speed tripled, its time to go around its circular path would be
A) double. B) one third. C) triple. D) one half. E) the same.
Which of the following is NOT an ion?
A) H+1 B) Br- C) O2 D) Mg+2 E) NO3-
The diagram below shows a cross section of the interior of Uranus. Which of the regions do current computer models suggest is composed primarily of liquid water? The lowest pressure regions will be gaseous
a.
region 1
b.
region 2
c.
region 3
d.
all of the regions
e.
none of the regions
The blue light from the sky has been polarized by:
a. selective absorption. b. reflection. c. double refraction. d. scattering.