Bernoullis Principle 2
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azfaBernoulli's principle states that fluids flow from high pressure to low pressure. When drinking from a straw, the higher air pressure pushing down on the surface of the drink forces the fluid up the straw where the pressure is lower. The principle also explains that as the speed of a fluid increases, the pressure exerted by that fluid decreases, so faster moving air above an object exerts less pressure and allows the object to be pushed up, while faster air below exerts greater pressure and pushes the object down.
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Force is a push or pull on an object, while pressure is the amount of force applied over an area. There are different types of scales and gauges to measure force and pressure. A spring scale measures force by how far a spring stretches under the force of an object. A balanced scale uses levers to balance the force of objects on either side. Pressure is calculated by dividing the total force by the area it is applied to. Common pressure gauges include the Bourdon, Schrader, and diaphragm gauges.
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Pressure depends on the force applied over an area. Fluid pressure is caused by the constant movement of fluid molecules in all directions. Air pressure changes with elevation, decreasing as you go higher, due to having less air above you. The buoyant force on a submerged object is equal to the weight of the fluid it displaces. Whether an object sinks or floats depends on its density compared to the fluid - objects with a higher density than the fluid will sink, while less dense objects will float.
The basic principles behind flight
To fly, an airplane must balance four forces: lift, weight, thrust, and drag. Lift counters the force of weight and is generated by the wing shape and angle of the wings in relation to the oncoming air. Thrust, generated by engines, overcomes drag, the force resisting the plane's movement through the air. If thrust exceeds drag, the plane speeds up, and if lift exceeds weight, the plane climbs. The special shape and angle of airplane wings causes faster moving air above the wing, creating lower pressure and lifting the plane into the air.
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This document discusses forces inside fluids and key concepts like density, pressure, hydrostatics, and Archimedes' principle. It defines density as mass per unit volume and pressure as force per unit area. It explains that hydrostatic pressure depends on depth, fluid density, and gravity. Connecting vases and Pascal's principle are consequences of fluids transmitting pressure undiminished. Archimedes' principle states that the buoyant force on an object equals the weight of fluid displaced. Atmospheric pressure can be measured using experiments with liquid columns.
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Bernoulli's Principle
Bernoulli's principle states that as the velocity of a fluid increases, the pressure within the fluid decreases. It explains that the movement of fluids and gases is due to differences in pressure. Specifically, it concludes that when the velocity of a fluid increases, the pressure within the fluid decreases.
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The document outlines a 2 period lesson plan on Bernoulli's principle. It includes 3 stages: 1) hands-on activities to demonstrate how fluid velocity affects pressure, 2) a practical experiment and discussion of Bernoulli's principle, and 3) examining applications like airplane wings and answering worksheet questions. The goal is for students to understand that fluid pressure decreases as speed increases according to Bernoulli's principle through observation, discussion, experimentation and making connections to real-world examples.
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Bernoulli's principle states that as the velocity of a fluid increases, the pressure within the fluid decreases. It explains that the movement of fluids and gases is due to differences in pressure. Specifically, it concludes that when the velocity of a fluid increases, the pressure within the fluid decreases.
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1) The document discusses Archimedes' principle and buoyancy. It provides examples measuring the weight and buoyant force of objects in air and water.
2) Archimedes' principle states that the buoyant force on an object immersed in a fluid is equal to the weight of the fluid the object displaces.
3) The document uses examples to demonstrate how to calculate buoyant force and determine if an object will float or sink based on its density compared to the fluid.
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Bernoullis Principle 2
- 1. Bernoulli’s Principle Chapter 11 Section 4
- 2. Fluid Motion Fluids flow from high pressure to low pressure How does this relate to drinking out of a straw? Higher air pressure pushing down on the surface of the drink forces fluid up straw where there is less pressure.
- 3. Bernoulli’s Principle The faster a fluid moves, the less pressure it exerts. As fluid speed increases, the pressure decreases. Remember, air is fluid!
- 4. Turn to pg. 437 and try Standards Warm-up Draw a picture of what you did and draw arrows to show the side where the force is greater.
- 6. Objects in Flight IF the air moves faster above the object, fluid pressure pushes the object upward. IF the air move faster below the object, fluid pressure pushes it downward.
- 9. Air moves faster when you squeeze the bulb….lowering the air pressure.Higher air pressure in the bottle…