Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. 
At what value of t is the speed of the particle equal to 0 m/s?
A. 0 s
B. 1 s
C. 2 s
D. 3 s
E. 4 s
Answer: D
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Repeat Problem 9.26 part (b) and (c) but assume that condensation occurs on a 5 cm-OD horizontal tube.
GIVEN
? SO2 condensing on a horizontal tube
? Tube outside diameter (D) = 5 cm = 0.05 m
? Pressure (p) 490 kPa
? SO2 properties
FIND
(a) Condensate film thickness (S) at 1.3 cm from the bottom (x = L – 1.3 cm = 0.187 m)
(b) The average heat transfer coefficient (hc)
(c) The rate of condensation (m) in kg/h
ASSUMPTIONS
? Steady state
? Laminar condensate flow
? Vapor density is negligible compared to the liquid density
SKETCH
A star's ________ parallax is found by using the spectral lines to estimate the spectral class and luminosity of distant stars
Fill in the blank(s) with correct word
The overall direction of change in the universe is toward
A. a state of increased mass in the universe. B. a state of greater disorder. C. a state of increased organization. D. increased energy content of the universe.
A cheetah can run at approximately 100 km/h and a gazelle at 80.0 km/h. If both animals are running at full speed, with the gazelle 50.0 m ahead, how long before the cheetah catches its prey?
a. 9.0 s b. 14 s c. 18 s d. 4.5 s e. 21 s