5.48 The hydraulic dredge shown in Fig. P5.48 is used to dredge sand from a river bottom. Estimate the thrust needed from the pro- peller to hold the boat stationary. Assume the specific gravity of the sand/water mixture is SG = 1.4. 9 ft: Prop 2-ft diameter 30 ft/s 30°

5.48 The hydraulic dredge shown in Fig. P5.48 is used to dredge sand from a river bottom. Estimate the thrust needed from the pro- peller to hold the boat stationary. Assume the specific gravity of the sand/water mixture is SG = 1.4. 9 ft: Prop 2-ft diameter 30 ft/s 30°

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.

Question

5.48 The hydraulic dredge shown in Fig. P5.48 is used to dredge
sand from a river bottom. Estimate the thrust needed from the pro-
peller to hold the boat stationary. Assume the specific gravity of
the sand/water mixture is SG = 1.4.
-9 ft
Prop
Figure P5.48
30 ft/s
2-ft diameter
30°

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