What is Static fluid: Definition and 12 Discussions

Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge. Static electricity is named in contrast with current electricity, which flows through wires or other conductors and transmits energy.A static electric charge can be created whenever two surfaces contact and have worn and separated, and at least one of the surfaces has a high resistance to electric current (and is therefore an electrical insulator). The effects of static electricity are familiar to most people because people can feel, hear, and even see the spark as the excess charge is neutralized when brought close to a large electrical conductor (for example, a path to ground), or a region with an excess charge of the opposite polarity (positive or negative). The familiar phenomenon of a static shock – more specifically, an electrostatic discharge – is caused by the neutralization of charge.

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  1. tracker890 Source h

    Q：Hydrostatic Pressure vs. Energy Conservation Equation

    Please help me to understand which ans is correct. To determine the ##P2##. $$ h_{LM}\ne 0 $$ Method 1： $$dP=\frac{\partial P}{\partial x}dx+\frac{\partial P}{\partial y}dy+\frac{\partial P}{\partial z}dz$$$$\phantom{\rule{0ex}{0ex}}\rho \overset\rightharpoonup{a}=-\triangledown p+\rho...
  2. A

    Calculating Water Force and Moment in a Fresh Water Storage Tank

    1. Homework Statement A fresh water storage tank in a factory is shown in the figure above. Its top side is denoted as C, the narrow side as B and the long side as A. In order to allow regular maintenance and cleaning side A is hinged at its bottom edge and secured using a heavy-duty clasp at...
  3. C

    Forces Due to Static Fluids

    Homework Statement Find height (h) of the water level which can result in failure of dam by tipping it over due to water pressure at U/S of dam. Also draw the free body diagram. Density of water to be = 1000 kg/m^3 and its specific weight=62.4 lb/ft^3 Hints: The specific weight of concrete is...
  4. N

    Density, buoyancy, and volume in static fluids

    Homework Statement A rock is suspended by a light string. When the rock is in air, the tension in the string is 35.7N . When the rock is totally immersed in water, the tension is 25.9N . When the rock is totally immersed in an unknown liquid, the tension is 19.6N . Homework Equations Density =...
  5. G

    Torque due to static fluid- Transport Phenomena

    1. Homework Statement Calculate the torque on the dam about the origin (Picture attached) due to the pressure force of the fluid. Homework Equations Pressure force is correct (dF) The Attempt at a Solution [/B] I have solve it; however, I am not sure if I calculated over the origin asked...
  6. B

    Calculating Liquid Height Difference in U-Tube | Fluid Mechanics Homework

    Homework Statement One hundred millilitres of water is poured into a U-tube that has a cross-sectional area of 1 cm2. Then 100 millilitres of oil, with a density 80% that of water, is poured down one side of the U-tube so that the oil floats on the water. Find the difference in height of the...
  7. B

    Bernoulli's equation, static fluid, gauge pressure problem.

    Hi, I haven't done many problems of this nature so there are a few steps in my working that i'd like to check are acceptable/agree with what the question implies. Homework Statement A water tower is a familiar sight in many towns. The purpose of such a tower is to provide storage...
  8. B

    Factors Impacting Pressure in a Static Fluid

    Homework Statement what factors affect the size of the pressure at a point in a static fluid? Homework Equations The Attempt at a Solution
  9. B

    What Happens When a Piston is Added to a Cylinder in Pascal's Law Experiment?

    Hi First off I'm not a student, this is purely a curiosity question In pascals law classic drawing if you added a piston inside one of the cylinders what would happen? I've added a drawing to clarify I'm totally split on what the answer is, Pascals law seems to state the pressure on...
  10. C

    Contraction of a static fluid due to cooling

    Hi, I'm trying to model a compensation device in a hydraulic system. Basically, I have a closed pipe that contains a body of liquid (water glycol) and as time elapses this fluid is subject to a cooling effect. This results in contraction and hence a pressure decrease which is subsequently...
  11. B

    Pressure and depth in a static fluid

    A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013 × 1055Pa for the atmospheric pressure...
  12. F

    Static fluid pressure. What did I do wrong?

    Homework Statement Calculate the depth h of mud for which the 3m concrete retaining wall is on the verge of tipping about its forward edge A. The density of mud may be taken to be 1760 kg/m3 and that of concrete to be 2400 kg/m3 The Attempt at a Solution So I made A actually at 1.5m down...
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