A small hole develops in the bottom of the stationary rowboat
shown in Fig. P3.105. Estimate the amount of time it will take
for the boat to sink. List all assumptions and show all calculations.
This is an open-ended student activity for which
A truck carrying chickens is too heavy for a bridge that
it needs to cross. The empty truck is within the weight limits;
with the chickens it is overweight. It is suggested that if one
could get th
5.29 A water jet leaves a fixed nozzle with a velocity of 10 m/s. The jet diameter is 10 cm. A 30o
cone is pushed into the water jet at a speed of 5 m/s. The water impinges on the cone with the jet
axis and the cone axis in perfect alignment so that the w
Estimate the rate (in gal/hr) that your car uses gasoline when
it is being driven on an interstate highway. Determine how long it
would take to empty a 12-oz soft-drink container at this flowrate.
List all ass
3.75 Water flows steadily through the variable area pipe shown in Fig. P3.75 with negligible
viscous effects. Determine the manometer reading, H, if the flowrate is 0.4 m3 / s and the density
of the manometer fluid is 500 kg / m3 .
Solution V = ui + v j + wk
+ w k
a = + u + v + w i + + u + v + w j +
u v w
= = = 0
t t t
Using software to perform calculus and algebra results in:
(x y ) z
(x + y )
Figure P5.46 shows a lateral pipe fitting. This particular fitting has a mainline diameter of 4.0 in.
The diameter of the lateral is 3.0 in., and the lateral angle is 45; 60 F water is f
For any steady flow the streamlines and streaklines are the
same. For most unsteady flows this is not true. However, there are
unsteady flows for which the streamlines and streaklines are the
same. Describe a flow field for which this is true.
Flow of a viscous fluid over a flat plate surface results in the development of a region of reduced
velocity adjacent to the wetted surface as depicted in Fig. P5.25. This region of reduced flow is