Why can t electrons be wiped out? Will e commerce eliminate middlemen Zhihu

Electrons can be destroyed, and when an ordinary electron collides with an anti-electron (which is only found in the depths of the universe with a positive charge), they both disappear and release energy.

But energy cannot be destroyed.

The law of conservation of energy states: "All matter in nature has energy, and energy can neither be created nor destroyed, but can only be transformed from one form to another, from one object to another, and the total amount of energy is constant in the process of energy conversion and transfer". This is an unconditionally true law of nature.

Electrons can annihilate and disappear with positrons (antiparticles of electrons, or antielectrons) to form photons that release energy.

Electrons can be destroyed, but the subjects in the conservation law, which can conform to the facts under the lowest conditions, such as charge and energy, will not be destroyed.

The energy of the environment is conserved, and if the electron disappears, then the energy it carries also disappears, and the total energy in nature is not conserved. Electrons can only be transferred, not disappeared.

Electrons can be destroyed. It's just that it transforms into other particles. Understand it holistically with the law of transformation and conservation of energy.

When positive and negative electrons collide at high speed, photons are generated, which are eventually radiated in the form of energy. Beijing's electron-positron collider is an example of this.

E-commerce does not eliminate middlemen.

First, not to mention whether e-commerce can eliminate middlemen, de-intermediation itself is a false proposition. Before the advent of e-commerce, there were a large number of businessmen who used this reason to engage in some unique business models. In the hearts of Chinese, they are willing to accept that a commodity has production costs, but they are not willing to believe its circulation costs, display costs, brand costs, information costs and emotional costs.

Due to the existence of intermediaries, the workload between upstream and downstream can be reduced to the point where the transaction can be completed, otherwise, there will be various problems in terms of information flow, capital flow and logistics, not to mention intangible communication such as "trust between the two parties to the transaction".

Second, e-commerce itself is a middleman. The buyers of Carrefour, Wal-Mart RT-Mart and METRO that we are familiar with have already gone to **, JD.com, Tmall, No.1 store, and womai.com. In fact, the so-called non-earning intermediate link price difference does not exist, and if the enterprise wants to survive, it can only charge more if it does not earn the difference, and in the end it is just a relationship between the front desk and the back office.

Can be connected to the zero line, however, the ground wire can not be connected to the air switch, the function of the switch is to control the line opening section, when the zero line access switch, the switch disconnects the zero line, that is, the line is disconnected, the line is out of power; The ground wire can not be connected to the switch at any time, the ground wire is connected to the equipment shell and the ground, there is a protective effect, once the access switch, if the switch is disconnected, the ground wire is disconnected, so that the protective role is lost.

Then, the ground wire and the high-voltage wire can not be short-circuited, can not leakage, pay attention to safety, use electronic mousetraps. Finally, wiring is the key, fully automatic folding electronic high-voltage mouse-trapping, wiring board, similar to a high-speed toll station, as long as you come, you don't run, and the electricity doesn't run. It can be intercepted, contained, prevented from entering and electro-trapping rats that have entered the room.

The output of the electronic rat exterminator is not responded to after the electric screw is plugged in.

I agree with the second one, although e-books are convenient, but there is radiation.

I have a habit of reading books.

It's when you read the book for the second time.

Will pick a wonderful plot to watch.

In this case, if it is a book.

You can flip to your favorite place, and it's convenient to jump and watch.

And e-books.

Excuse me. Of course, e-books can be useful at times.

For example, when traveling, it will be much lighter to carry an e-book than to carry a lot of books == so let's coexist.

Reading is a kind of spirit, reading is a kind of temperament, the first time reading is to absorb knowledge, the second time reading is a beautiful taste, the third time reading is to integrate feelings, books are also a kind of tradition, a kind of culture, science and technology can develop rapidly, but can never change the charm of books!

It's just a little effective, but it can't really completely exterminate cockroaches. If you want to completely exterminate cockroaches, it is recommended that you use Jiebing Killing Cockroach Bait or Gold Thick Killing Cockroach Bait, which is a special medicine for killing cockroaches, and all the cockroaches die within a few days at a time, and the effect can be maintained for up to a year or so.

In general, I haven't bought it.

You can reach in and try it yourself.

1.Electrons can be destroyed. Electron and positron annihilation produces a tremendous amount of energy.

2.There are no fewer electrons, but the rate at which electrons pass through has decreased. So the number of electrons passing through the resistor cross-section per second is less, and the current is less.

Electric current and electrons are not directly "equivalent", and electric current is defined as the directional motion of electrons in a conductor.

Its strength is directly proportional to the number of electrons in directional motion and velocity.

Resistance simply reduces the number of ordered electrons in the conductor and not the number of electrons in the conductor.

It's like the orienteering movement of a swarm of flies in a room, called "fly flow", and some flies take a break when they are tired...