Transmitting Pressure in a fluid. 11-2 Pascals Principle In 1600 a French mathematician stated that When force is applied to a confined fluid an increase in
pressure is transmitted equally to all parts of that fluid. This is known as Pascals Principle. A force pump causes the fluid to move from one place to another by increasing the pressure in the fluid.
Force Pumps For example: tube of toothpaste, ketchup bottle, your heart Using Pascals Principle Page 356 for graphic.
What does the graphic show? That when you increase the area of the piston you are multiplying the force. Hydraulic Systems Multiplies a force by applying the force to
a small surface area. The increase in pressure is then transmitted to another part of a confined fluid, which pushes on a larger surface area. Hydraulic System
Used on fire truck ladders, brake systems in cars,and sea stars. Floating and Sinking 11-3
Buoyancy Buoyant forces act on submerged objects. The buoyant force acts in the upward
direction, against the force of gravity, so it makes the object feel lighter. Buoyancy Fluid pressure is exerted in all directions on a submerged object. Since pressure increases with depth,
the upward pressure is on the bottom of an object is greater than the downward pressure on the top. The net force acts upward and is called buoyant force. Archimedes Principle
The buoyant force on an object is equal to the weight of the fluid displaced by the object. Sinking
If the weight of the object is greater than the buoyant force the object sinks. It only sinks far enough to displace a volume of liquid
=to its own weight Density Density is mass/volume. An object that is more dense than the fluid in which it is immersed sinks. An object that is less dense than the fluid in which it is immersed floats. Density of water = 1.0 g/mL
Floating If the weight of the object is less than the buoyant force, Applying Bernoullis
Principle Figure 7.3: Lift of an aircraft wing Bernoullis Principle The pressure exerted by a moving stream of fluid is less than
the pressure of the surrounding fluid. Objects in flight Apply Bernoullis Principle by their
shapes. Different shapes cause the air to move at different speeds above and below them. Airplane wings?
They are shaped so that the air moves faster over the top of the wing and pressure pushes the object upward.
MRP Process at LAUSD. Materiel Management Branch staff have the ability to maintain and manage material master records in SAP. Materiel Management Branch staff manage material master data by assigning materials to MRP control parameters such as MRP type, MRP...
Protected Members and Class Access. protected member access specification: like private, but accessible by objects of derived class. Class access specification: determines how private, protected, and public members of base class are inherited by the derived class. CS1 -- Inheritance...
Virtual Network Embedding Survey To map virtual networks onto physical network resources. Lilin Zhang ICC08 One objective: to efficiently assign VNs to specific SN nodes and links in distributed heuristic manner, while minimizing the network cost.
Activating Strategy:Concept AttainmentActivity. Instructional Approach(s): The teacher should facilitate the concept attainment activity in which the teacher provides the class with "Yes" and "No" examples while the class tries to guess the topic being discussed.
Chapter 2 The Business Vision & Mission Strategic Management: Concepts & Cases 11th Edition Fred David Shared Vision -- Creates commonality of interests Reduce daily monotony Provides opportunity & challenge To be the first choice in the printed communications business.
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