A 6 cm diameter cooling coil tube has a surface temperature of 5ºC when air at 25ºC and 100 kPa flows around it at 10 m/s. Estimate the location on the tube where the maximum convection heat transfer coefficent occurs and determine the amount of heat transfer per unit area.
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Which of the following is not a characteristic of the outer planets?
A) They all have rings. B) They all have large quantities of gas. C) They have very few, if any, satellites. D) They are primarily made of hydrogen and helium. E) Their orbits are separated by relatively large distances.
Nearsighted people wear glasses with
lenses that are designed to a) make the image larger. b) improve the focus of the image. c) make the image smaller. d) make the image brighter.
The standard exam page is 8.50 inches by 11.0 inches. Its area in cm2 is
A. 19.5. B. 36.8. C. 93.5. D. 237. E. 603.
An organ pipe of length L that is open at one end resonates in its third harmonic with a wavelength of 2L/3. Is the other end of the pipe closed or open?
A) closed B) open C) We cannot tell from the information provided.