How would you analyze multiple horizontal cylinders?
What will be an ideal response?
The most significant parameter to consider for free convection of multiple
horizontal cylinders is the amount of spacing between the cylinders. If the
spacing is more than about twice the diameter of the cylinders, the cylinders
may be analyzed separately, but for closer spacing special empirical methods
and actual experimental testing probably will provide a reasonable solution
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Consider a hydrogen atom and a singly-ionized helium atom. Which atom has the lower ground state energy?
1.hydrogen 2.helium 3.The ground state energy is the same for both.
The three graphs in the figures below represent the position vs. time for objects moving along the x-axis. Which, if any, of these graphs is not physically possible?
When potassium and sulfur react to form potassium sulfide, an ionic compound,
a. each sulfur atom loses two electrons. b. each sulfur atom loses one electron. c. each potassium atom loses one electron. d. each potassium atom loses two electrons.
What is the most common form of gas in the interstellar medium?
A) ionized hydrogen B) molecular hydrogen C) atomic helium D) atomic hydrogen E) molecular helium