A plane is moving due north, directly towards its destination. Its airspeed is 200 mph. A constant breeze is blowing from west to east at 42 mph. In which direction is the plane pointed?
a. 5.7° W of N
c. 22° W of N
b. 12° W of N
d. 11° E of N
B
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The process by which raindrops are formed by the collision of droplets is called
a. the Bergeron process. b. fusion. c. fission. d. coalescence.
A metric ton (or tonne) is
a. the same as a British ton. b. not defined. c. a mass unit. d. a weight unit.
Determine the outlet temperature of oil for the same initial temperatures of the fluids if the flow arrangement is one shell pass and two tube passes, but with the same total area and average overall heat transfer coefficient as the unit in
• Water cooling oil in a tube and shell heat exchanger
• Water flow rate ( m
w)= 1.25 kg/s
• Oil flow rate ( m
o)= 2.5 kg/s
• Oil specific heat (cpo) = 2093 J/(kg K)
• Water inlet temperature: (Tw,in) = 15°C
• Oil inlet temperature: To,in = 95°C
• Overall heat transfer coefficient (U) = 280 W/(m2 K)
• One shell and two tube passes
• Same surface area as Problem 10.23: A = 11.2 m2
FIND
• The oil outlet temperature (To,out)
SKETCH
PROPERTIES AND CONSTANTS
the specific heat of water (cpw) = 4187 W/(kg K)
_______________ is to the Sun as ____________ is to Earth
a. Asteroseismology, geology b. Helioseismology, seismology c. Seismology, volcanology d. Astrology, astrobiology