The horizontal constricted pipe illustrated in Figure 14.20, known as a Venturi tube, can be used to measure the flow
speed of an incompressible fluid. Determine the flow speed
at point 2 if the pressure difference P - P2 is known.
Р
P2
Courtesy of Central Scientific Company
Az
A
(a)
(b)
Figure 14.20 (Example 14.9) (a) Pressure P, is greater than
pressure P, because my <12. This device can be used to mea-
sure the speed of fluid flow. (b) A Venturi tube, located at the
top of the photograph. The higher level of fluid in the middle
column shows that the pressure at the top of the column, which
is in the constricted region of the Venturi tube, is lower

Geologists get to play with chemistry, physics, and history! and what a history you will meet as youwork your way through the course. starting at the beginning, the textbook provides the scientifically acceptedstart of the and promises that you'll get to explore some of the evidence for that scientific view, later inthe semester. meanwhile, which is more nearly correct of the scientifically accepted view? a) the earth formed when the big bang caused older materials to fall together, about 14 billion years ago. b) the earth formed from the falling together of older materials, about 4.6 billion years ago. c) the earth formed in the big bang, about 6000 years ago. d) the earth is eternal, having been here forever and promising to be here forever. e) the earth was assembled by gigantic space beavers, which gnawed down the primordial tree of life andpiled its branches together to form the planet.