Water and mercury are diamagnetic because water and mercury do not influence each other with magnets. According to relevant public information, because they do not have unpaired electrons, we generally cannot observe that water and mercury are repelled by magnets. This is mainly because their diamagnetic properties are relatively weak and current-carrying conductors are affected by the force. magnetic field, mercury will flow and stop when the power is turned off.
What types of flow meters are there?
Category: Education/Science>> Science and technology
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Toilets flush When water flows, the water flow creates a vortex and flows into the drain. Some theories say that in the northern hemisphere the water vortex rotates clockwise; in the southern hemisphere, it rotates counterclockwises of a watch. The reason this phenomenon occurs is due to the rotation of the Earth. But it's a myth.
In fact, the effect of the Earth's rotation is very small, so it is difficult to influence the direction of water flow. You can easily check this in some bathrooms, where the direction of the water swirl, whether counterclockwise or clockwise, depends on the structure of the bathroom. 'sink and not from the northern and southern hemispheres.
First think about the origin of the water vortex. Most information, even the physics teacher tells us that the water vortex is due to the Coriolis force, so the northern hemisphere flows clockwise and the southern hemisphere. flows counterclockwise. The Coriolis force is true. It causes changes in wind direction on Earth, but does the Coriolis force affectthe water swirls? If the Coriolis force affects the vortex of water flow, then we should also be affected by the Coriolis force when we usually play basketball or billiards, but it seems not... Actually , the vortex of water flow is only caused by the instability of the water tank or water in water. If the water initially rotates a little clockwise due to the existing disturbance, as the water gradually flows, the angular velocity will inevitably increase due to the conservation of angular momentum, and we will see a vortex of water flowing. Assuming the bottom of the water tank is completely horizontal, the water will also be completely horizontal, so no matter where it is, the water will flow straight down. no swirl. Therefore, there is no clockwise flow in the northern hemisphere and in thecounterclockwise in the southern hemisphere. It's just the product of someone's explanation of the Coriolis force. If you don't believe it, you can find the difference for yourself. . Do some experiments in a water tank... If the vortex of water flow is related to the Coriolis force, then the vortex of water flow on the equator line will not have no specific direction.
People will die at the top of the pyramid, and the structure has great uses
Classified according to the structural principles of flow meters, according to the actual situation of the current. flow meter, according to the characteristics of the flow meters. The structural principles can be roughly summarized into the following types: 1. Volumetric flow meter A volumetric flow meter is equivalent to a container of standard volume that continuously measures the flowing fluid. The greater the flow rate, the greater the number of measurementsis important and the higher the output frequency. The principle of the volumetric flow meter is relatively simple and is suitable for measuring fluids with high viscosity and low Reynolds number. According to the different shapes of the rotating body, the products currently produced are divided into: oval gear flow meter suitable for liquid flow measurement, waist wheel flow meter (Roots flow meter), rotary piston flow meter and scraper.Meters; Servo type volumetric flow meters, membrane and rotary flow meters suitable for gas flow measurement. 2. Turbine flow meter The working principle of turbine flow meter is to place the turbine in the measured fluid and rotate under the impact of the fluid flow. The rotational speed of the turbine reflects the flow rate. Typical turbine flow meters are water meters and turbine flow meters, and their structures can be mechanical transmission output or pulse outputelectric ion. Generally, mechanical transmission water meters have low accuracy, with an error of about ±2%, but they have simple structure and low cost. They were mass-produced in China and are standardized, universal and serialized. Turbine flow meters with electrical pulse signal output have higher accuracy, with a general error of ±0.2% to 0.5%. 3. Differential pressure flow meter (variable pressure drop flow meter) The differential pressure flow meter consists of a primary device and a secondary device. The main device is called the flow measuring element. It is installed in the pipeline of the fluid to be measured and generates a pressure difference proportional to the flow rate (flow rate) so that the secondary device displays the flow rate. The secondary device is called a display instrument. It receives the differential pressure signal generated by the measuring element and converts it into diecorresponding bit for display. The main device of a differential pressure flow meter is often a throttling device or a dynamic pressure measuring device (Pitot tube, velocity averaging tube, etc.). The secondary device is a variety of mechanical, electronic and combined differential pressure gauges equipped with flow display instruments. The differential pressure sensitive components of differential pressure gauges are mostly elastic components. Since differential pressure and flow rate have a square root relationship, flow display instruments are equipped with square root devices to linearize the flow scale. Most instruments are also equipped with a flow accumulation device to display the accumulated flow for economic accounting purposes. This method of using differential pressure to measure flow has a long history and isrelatively mature. It is generally used in important occasions all over the world, accounting for about 70% of various flow measurement methods. This meter is used to measure the flow rate of main steam, feed water, condensate water, etc. in power plants.
I think it should be a magnetic field, because the electronic magnetic moments in the atoms of some diamagnetic materials cancel and the resulting magnetic moment is zero. Water has an angular molecular structure with conjugated electron pairs and is diamagnetic. When subjected to an external magnetic field, the orbital motion of the electron will change and a small resulting magnetic moment will be generated in the direction opposite to the external magnetic field. Principle: There are electrons around the nucleus. Electrons are divided into electronic shells according to different energies. Each electr layeronic is divided into layers of subelectrons. There are orbits in the sub-electron shells. Each orbit has only two opposing electrons. spin directions.These two electrons have different spin directions.The areas of existence of each electron can basically be considered coherent. When an external magnetic field appears, all electrons in orbital motion will be affected by the strength of the magnetic field and their rotation circles. will be shifted to some extent, which will produce a small additional magnetic field. But if another electron with opposite spin in the same orbit also generates an additional opposite magnetic field, the previous electron's magnetic moment will. Therefore, the more single electron orbits, the greater the magnetic moment. These molecules include H2O, SiO2 and AlCl3. When the magnetization M is negative, the solid appears diamagnetic. Metals such asBi, Cu, Ag and Au have this property. In an external magnetic field, the internal components of such magnetized mediaThe intensity of magnetic induction is less than the intensity of magnetic induction M in a vacuum. The magnetic moment of atoms (ions) of diamagnetic substances must be zero, that is, there is no permanent magnetic moment. When a diamagnetic material is placed in an external magnetic field, the external magnetic field changes the orbit of the electrons and induces a magnetic moment in the direction opposite to the external magnetic field, which manifests as diamagnetism. Diamagnetism therefore arises from changes in the orbital state of electrons in atoms. The diamagnetism of diamagnetic materials is generally very weak, and the magnetic susceptibility H is generally around -10-5, which is a negative value. I think the mummy is isolated from the world. Air quality and humidityair inside, and some things left in the pyramid have changed over the years, emitting various odors and producing a lot of bacteria, etc. There is none. rays at the top of the tower. If so, what type of radius is it?