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

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science