The type of nuclear reactor used in the United States was originally developed
A) during the Manhattan project.
B) in Canada.
C) as part of the H-bomb program.
D) by private industry.
E) for submarines.
E
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Repeat Problem 9.23 for a tier of six horizontal 2.5-cm-OD tubes under similar thermal conditions.
GIVEN
? Saturated steam condensing on horizontal tubes
? Tube outside diameter (D) = 2.5 cm = 0.025 m
? Tube outer surface temperature (Ts) = 27°C
? Steam pressure (p) = 12 kPa
? Number of tubes (n) = 6
FIND
? The average heat transfer coefficient (hc)
ASSUMPTIONS
? Steady state
? Film condensation occurs
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for saturated water at 12 kPa
An object floats on a fluid if its density is less than that of the fluid
Indicate whether the statement is true or false
Two point charges are 4 cm apart. They are moved to a new separation of 8 cm. By what factor does the resulting mutual force between them change?
a. 1/4 c. 1/2 b. 2 d. 4
The predominant gas in the atmosphere of Earth is
A) oxygen. B) nitrogen. C) water vapor. D) carbon dioxide. E) methane.