Write Darcy’s law for permeability processes.
What will be an ideal response?
The equation normally associated with Darcy’s law is
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Hot air flows through a square 60 cm x 60 cm steel heating duct and the outside surfaces are at 45ºC when the surrounding quiescent air is at 15ºC. Estimate the heat loss from the duct per unit length of the duct.
What will be an ideal response?
At a given location in space, the potential is known to be greater when one moves in any direction. To be more specific, no matter which direction one goes, a small step in that direction results in an increase in the potential by the same amount. This means that the Electric field at this location is
A. Can take on any value at all. B. Zero C. Negative D. Positive
Quasars have a(n) ____
a. extremely high blueshift b. moderate blueshift c. undetectable Doppler shift d. moderate redshift e. extremely high redshift
The ________ background radiation in fact far exceeds all the energy radiated by all the stars and galaxies that formed since then
Fill in the blank(s) with correct word