For a particular process where a fluid is being heated in a 2 inch (5.08 cm) diameter tube, the Nusselt number is predicted to be 45. If the fluid has a thermal conductivity of 1.5 Btu/hr·ft·ºF (2.6 W/mK) what is the predicted convective heat transfer coefficient?
What will be an ideal response?
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The Milky Way galaxy has collided with several other large galaxies in its lifetime
a. True b. False Indicate whether the statement is true or false
In the sky, declination is measured in degrees north or south of the celestial equator
Indicate whether the statement is true or false
A conducting sphere 45 cm in diameter carries an excess of charge, and no other charges are present
You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity. (k = 1/4??0 = 8.99 × 109 N • m2/C2 ) The excess charge on this sphere is closest to A) 0.35 nC. B) 79 nC. C) 315 nC. D) 350 nC. E) 700 nC.
Two forces produce equal torques on a door about the door hinge. The first force is exerted at the midpoint of the door; the second force is applied at the doorknob. Both forces are exerted perpendicular to the door
Which force has a greater magnitude? A) the first force (at the midpoint) B) the second force (at the doorknob) C) The two forces are equal.