Answer the following statement(s) true (T) or false (F)
The direction of the net force on a small magnet will be the same if the SG axis is reversed and the effect of the external magnet decreases in the axis direction instead of increasing.
TRUE
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Show that for fully developed laminar flow between two flat plates spaced 2a apart, the Nusselt number based on the ‘bulk mean’ temperature and the passage spacing is 4.12 if the temperature of both walls varies linearly with the distance x, i.e., ?T/?x = C. The ‘bulk mean’ temperature is defined as
GIVEN
• Fully developed laminar flow between two flat plates
• Spacing = 2a & ?T/?x = C
• Bulk mean temperature as defined above
FIND
• Show that the Nusselt number based on the bulk mean temperature = 4.12
ASSUMPTION
• Steady state
• Constant and uniform property values
• Fluid temperature varies linearly with x (This corresponds to a constant heat flux boundary)
SKETCH
Kepler's first law states that Earth's orbit around the Sun takes the shape of a(n) ______________
Fill in the blank(s) with correct word
Why doesn't the Hubble Space Telescope need adaptive optics?
What will be an ideal response?
Where will a planet in retrograde motion rise?
A. in the north B. in the east (just like everything else in the sky) C. in the south D. in the west (the opposite of everything else in the sky)