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Cosmossos
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Homework Statement
Can someone please explain to me why P3-P1=Pb-Pa?
[PLAIN]http://img694.imageshack.us/img694/8123/45074508.jpg
thank you
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The law of communicating vessels is based on P3 and P1 being equal. That is not the case here. You will need to know the height of water above a and b. For example if there was no water above a, Pa=P1. But Pb would not be equal to P3. So Pb-Pa is not equal to P3-P1.Cosmossos said:In the question I have here , it doesn't say anything about h2 and h1. it says that Pb-Pa=P3-P1 thanks to the Communicating_vessels law.But I don't understand why.
The pressure on fluids of mercury and water is determined by the weight and density of the fluid, as well as the depth of the fluid. Mercury is denser than water, so it will exert a greater pressure at a given depth compared to water.
The pressure on fluids of mercury and water plays a crucial role in determining their behavior. This pressure is responsible for the movement and flow of fluids, as well as their ability to support objects placed on top of them.
The pressure on fluids of mercury and water increases with depth due to the weight of the fluid above it. This is known as hydrostatic pressure and is directly proportional to the depth of the fluid.
Temperature can affect the pressure on fluids of mercury and water in two ways. Firstly, as temperature increases, the density of the fluid decreases, resulting in a decrease in pressure. Secondly, temperature also affects the viscosity of the fluid, which can impact its flow and behavior under pressure.
Understanding the pressures on fluids of mercury and water is crucial in many scientific and engineering fields. It is used in the design of hydraulic systems, such as water dams and pumps, and in the study of ocean currents and tides. It also has applications in medicine, such as measuring blood pressure and understanding the flow of fluids in the human body.