At which latitude is the noonday Sun overhead twice a year?
a. 30°S
b. 23°S
c. 24°N
d. 30°N
b
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Viscosity: Two horizontal pipes have the same diameter, but pipe B is twice as long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q = 
what is the flow rate in pipe A?
A. 2Q
B. 4Q
C. 8Q
D. 16Q
E. Q
Process of Science: Name a testable hypothesis from nebular theory that was proven true in observations of extrasolar planets. Does this mean the theory is complete?
What will be an ideal response?
What is the primary effect that the carbon dioxide in Venus' atmosphere has on the planet?
What will be an ideal response?
Most interstellar clouds remain stable in size because the force of gravity is opposed by ________ within the cloud
A) degeneracy pressure B) radiation pressure C) stellar winds D) thermal pressure