Our present days of the week are related to the names of the Sun, the Moon, and ______________ planets
Fill in the blank(s) with correct word
five visible
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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
Harry places a new air conditioner in the middle of his hot room, which when operating
A) cools the room. B) further warms the room. C) neither of these
A year is defined as:
A) the time it takes for Earth to complete a rotation on its axis. B) the time it takes for the Moon to complete an orbit of Earth. C) the time it takes for the Moon to complete a phase cycle. D) the time it takes for Earth to complete an orbit around the Sun. E) the time it takes for the Sun to complete an orbit around Earth.
Which of the following are advantages offered by the thorium nuclear reactor?
A) operates at relatively low temperatures B) produces isotopes of short radioactive half-lives C) difficult to use for bomb making D) All of the above.