The cycle of nitrogen at Triton's north pole resembles in some ways the cycle of carbon dioxide on _______________
Fill in the blank(s) with correct word
Mars
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Nitrogen gas is used to harden iron by diffusing the nitrogen into BCC iron at 700°C. If the surface concentration of nitrogen is maintained at 0.1 weight percent, what is the expected concentration of nitrogen 1 mm from the surface after 10 hours? You can assume that at small values of z, erf(z) is approximately equal to z.
What will be an ideal response?
____________________ are a form of dark matter that consists of very low mass stars and planets too faint to be seen
Fill in the blank(s) with correct word
Viscosity: Glycerin, with a viscosity of 1.5 N ? s/m2, is flowing with an average speed of 1.2 m/s through a tube that has a radius of 5.0 mm and is 25 cm long. What is the drop in pressure over the length of this pipe?
A. 140 kPa B. 46 kPa C. 72 kPa D. 76 kPa E. 130 kPa
The figure below shows the positions of particles in a longitudinal standing wave. One quarter period later the particle distribution is shown in
A.
B.
C.
D.
E.
