Electric Field, Electromagnetic Field, Gravitational Field Is there a pressure field in a fluid?

No, the field force can be called a conservative force, and the characteristics of the conservative force are that the work done has nothing to do with the path but only the beginning and end positions, and the second is that the objects in the field have energy (which may be stored but not generated).

Pressure is only a force, which completely obeys Newton's principle, and the impossibility of obeying w=fscos is independent of the path, and the object in the water does not receive energy (the object in the water descends at a uniform speed without kinetic energy change, because the difference between the upper and lower pressures is constant).

Is there a "pressure field" in a fluid?

Actually, what is a field? The so-called field. The property that you define as having all the points in space is called a field (mathematics).

The role of the field in particle physics and relativity is dynamic, that is, there is a conservation charge corresponding to a field.

For example, the electromagnetic field corresponds to the u(1) norm that does not change, and its conservation sum is the electric charge, and so on.

And the pressure in a fluid, or the stress tensor, is really a tensor field. The field here is a mathematical concept, not a physical dynamic.

So in fact, even though the fluid doesn't have a field called dynamics, the stress tensor is a field. In fact, general relativity is also built on fluids.

The simplest explanation is Einstein's field equation: r uv-1 2*r*g uv= *t uv

R uv represents the bending state of space, t uv, which can be seen as the so-called stress tensor, which represents the distribution of matter in space, and this can be seen as the so-called "fluid".

The more massive the object, the greater the curvature of the space-time around it, and when the small mass object passes by the large object, it will be affected by this curvature, fall down the vortex of curvature, and finally fall on the body of the large mass object.

An electric field is a substance. The electric field is not a substance composed of molecules and atoms, but the electric field has a force effect on the charge in it, so it can be seen that the electric field has the property of force, so the electric field is a special substance that exists objectively.

The magnetic field and the electric field are only superficially different, and there is no essential difference between them.

The matter that exists in the form of a field is also diverse, for example, the earth has a gravitational pull on objects near its surface, so there is a gravitational field in the space around the earth, which can also be called a gravitational field; There is a force around the vertical magnet or energized wire on the ferromagnetic material inside, which is the magnetic field.

Electric and magnetic fields are actually sensitive electromagnetic waves, but they are electromagnetic waves with high frequency and height.

Electromagnetic waves can act on many things and change their structural state (e.g., light can heat up objects, radio waves can push electrons in wires to form electric currents, etc.).

When the radio wave propagates through space Zd to the receiver, the electromagnetic field change caused by the radio wave will generate a current in the conductor. The purpose of information transmission is achieved by extracting the information from the current change through demodulation.

The energy properties of the electric field are shown as follows: when the charge moves delicately in the electric field, the electric field force does work on the charge (which indicates that the electric field has energy).

Analysis: From Gauss's theorem, obtained.

e=σ/2ε。) Homogeneous electric field.

is the surface density of the electric repentant charge.

I hope that it will help you, I wish you progress in your studies and be happy every day.

There are two spatial forms of matter: one is physical matter (gas, liquid, solid object and even social organization), and the other is energy field matter (electric field, magnetic field, gravitational field, electromagnetic field, etc.).Solid matter occupies exclusive space, while energetic field matter can share space but also has spatial attributes such as directionality.

The field is energy, and energy can be converted into mass, so it can be said that the field is matter! Whether it is a magnetic field, an electric field, or a gravitational field, all fields are vector quantities including strong fields and weak fields, all fields can distort space and time, all masses can also distort time and space, and most importantly, distortion is different from perturbation, distortion increases with the increase of mass (energy), there is a concept of change time and smooth change time, which is mathematically represented by square (square root), when the smooth change time is transformed into change time when it moves in a circle, and the change time can produce perturbations, The disturbance field is only related to the disturbance mode, no matter what field can be converted into each other, the disturbance of the electromagnetic field and the strong field can produce gravitational waves, gravitational waves can be guided, enhanced and weakened, which is different from gravity, gravity can penetrate any medium, gravity can not be guided, these are the most cutting-edge disciplines in our country, there are no experiments to confirm, the experimental equipment is very expensive, and it will not be able to catch up with developed countries in theoretical physics experiments within 50 years!

The electric field is similar to the gravitational field, and the basic characteristic of the electric field is that it has a strong effect on the charge placed in it, indicating that the electric field force is similar to the gravitational force The amount of electric charge is similar to the mass of the object, then it can be seen from the analysis of g=mg, f=qe, that the gravitational acceleration g is analogous to the electric field strength e in the electric field, and the direction is vertical downward

The ratio of the gravitational potential energy of an object to its mass can be defined as the gravitational potential in a gravitational field If the gravitational potential energy of an object on the ground is zero, then the gravitational potential energy at a height h above the ground is: mgh, then the expression for the gravitational potential is:

mghmgh so the answer is: g; Straight down, gh

The magnetic field is a special substance that cannot be seen or touched, and the magnetic field is not made up of atoms or molecules, but the magnetic field exists objectively. The magnetic field has the radiative properties of wave particles. There is a magnetic field around the magnet, and the interaction between the magnets is mediated by the magnetic field, so the two magnets can act without contact.

An electric current, a moving charge, a magnet, or a special form of matter that exists in the space around the changing electric field. Since the magnetism of a magnet is the same as the current, the current is the movement of an electric charge, so in a nutshell, the magnetic field is generated by the change of the moving charge or electric field. From the point of view of modern physics, the only ultimate components that can form a charge in matter are electrons (with a unit negative charge) and protons (with a unit positive charge), so the negative charge is a point object with excess electrons, and the positive charge is a point object with excess protons.

The real source of the field where the moving charge produces the magnetic field is the magnetic field produced by the moving electrons or moving protons. For example, the magnetic field generated by an electric current is the magnetic field generated by electrons moving in a wire.

Similar to the electric field, the magnetic field is a vector field that is continuously distributed in a certain spatial area, and the basic physical quantity describing the magnetic field is the magnetic induction intensity vector, which can also be vividly represented by magnetic inductance lines. However, as a vector field, the nature of the magnetic field is quite different from that of the electric field. The magnetic field produced by a moving charge or a changing electric field, or the total magnetic field of the sum of both, is a vector field with no passive rotation, and magnetic field lines are closed clusters of curves, uninterrupted, and not crossed.

In other words, there is no source of emitting magnetic field lines in the magnetic field, and there is no tail of converging magnetic field lines, and the closure of the magnetic field lines indicates that the loop integral along the magnetic field lines is not zero, that is, the magnetic field is a rotational field instead of a potential field (conservative field), and there is no scalar function similar to the electric potential.

In quantum mechanics, scientists believe that pure magnetic fields (and pure electric fields) are the effects of virtual photons. In Standard Model terms, photons are the medium on which all electromagnetic interactions depend. In the low-field energy condition, the difference is negligible.

I hope I can help you with your doubts.

A field is a substance, something that actually exists.

It's still very difficult to be truly unified, and you can treat the field as a substance. The existence of the field proves that Newton's concept of overdistance is wrong. As for the alternating magnetic field to produce the electric field, it shows that the two have the same essence, and Faraday's experiment proves that Maxwell gave a specific mathematical form through Maxwell's equations, and in essence, magnetism comes from a toroidal current.

None of the electric fields are hypothetical magnetic fields are real but not matter gravitational fields are forces between two objects.

All are substances, and they have the properties of matter. According to Einstein's theory of relativity, energy is matter.