Bitcoin first deal

1. In August 2013,
experienced the period of bitcoin's soaring, at that time, we were basically staring at the computer every day

2. Bitcoin was founded on January 3, 2009<

the explanation of bitcoin is as follows:

the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, open source software was designed and released, and P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system.

3. Yes, at present, the service charge of okex 58coin is low. I can provide the download address

4. The concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system. Unlike all currencies, bitcoin does not rely on a specific currency institution to issue. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of money circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity

warm tips:
1. According to the notice and announcement issued by the people's Bank of China and other departments, virtual currency is not issued by monetary authorities, does not have monetary attributes such as legal compensation and compulsion, is not a real currency, does not have the same legal status as currency, and cannot and should not be used as currency in the market, Citizens' investment and transaction of virtual currency are not protected by law
2. Before you invest, it is recommended that you first understand the risks of the project, and understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistaking into the capital market
3. The above explanation is for reference only. Investors should not use such information to replace their independent judgment or make decisions only based on such information, which does not constitute any investment operation
response time: February 5, 2021. Please refer to the official website of Ping An Bank for the latest business changes
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5. The first transaction of bitcoin was not pizza, but took place in the independent forum of bitcoin. In 2009, a person exchanged $5.02 for 5050 bitcoins, and the unit price was the electricity cost of one bitcoin.

6. Bitcoin receives payments almost instantaneously. However, there is an average delay of 10 minutes before the network starts adding your transaction to a block to confirm the transaction and that you can use the received bitcoin. Confirmation means that there is a consensus on the Internet that the bitcoin you receive is not used to pay others, so it is recognized as your property. Once your transaction is included in one block, all subsequent blocks will include it, which will greatly consolidate this consensus and rece the risk of transaction cancellation. Each user can determine the time when the transaction is confirmed, but generally speaking, receiving six confirmations is as safe as waiting six months after a credit card transaction
anyone can become a bitcoin miner by running software on specialized hardware. mining software monitors transaction broadcast through P2P network and performs appropriate tasks to process and confirm these transactions. Bitcoin miners can earn transaction fees paid by users to speed up transaction processing and additional bitcoin issued according to fixed formula

new transactions need to be included in a block with mathematical workload proof before they can be confirmed. This kind of proof is hard to generate because it can only be generated by trying billions of calculations per second. Miners need to run these calculations before their blocks are accepted and rewarded. As more people start mining, the difficulty of finding effective blocks will be automatically increased by the network to ensure that the average time to find a block remains at 10 minutes. Therefore, the competition for mining is very fierce, and no indivial miner can control the content contained in the block chain
workload proof is also designed to rely on previous blocks, which forces the time sequence of block chain. This design makes it extremely difficult to cancel previous transactions, because the workload proof of all subsequent blocks needs to be recalculated. When two blocks are found at the same time, the miner will process the first block received, and once the next block is found, it will be transferred to the longest block chain. This ensures that the mining process maintains a global consistency based on processing capacity
bitcoin miners can neither increase their rewards by cheating, nor deal with the fraulent transactions that destroy the bitcoin network, because all bitcoin nodes will reject the blocks containing invalid data that violate the bitcoin protocol rules. Therefore, even if not all bitcoin miners can be trusted, the bitcoin network is still secure
if you still don't understand, go to bitcoin home to see the deeper understanding of netizens.

7. The formation of the solar system is closely related to the evolution of the sun itself. The formation of the sun goes through three periods and five processes, namely the nebula period, the variable star period and the main sequence star period. The five processes are condensation contraction process, fast gravitational contraction process, slow gravitational contraction process, flare up process and hydrogen combustion process, The formation of planets is only a by-proct of the evolution of the sun, that is, the sun evolved to a certain stage before the formation of planets and satellites and other celestial bodies. This is a very complicated evolutionary process, with regularity, particularity and contingency. This paper only briefly describes the formation process of the solar system, without theoretical derivation and complicated mathematical calculation, but only gives the calculation results
ring the nebular period (including condensation contraction and fast gravitational contraction), the solar system was a part of the Milky way, 25000 light-years away from the galactic center. Near the Orion spiral arm, the sun led her family to rotate around the galactic center at a speed of 250 km / s, with a cycle of about 200 million years. Several billion years ago, the original nebula of the solar system was at this position. It has an initial velocity and a certain temperature (not high temperature). The diameter of the nebula is about 3000 astronomical units. In fact, the nebula has no obvious boundary. It is a diffuse hydrogen cluster with a low density of about 10.17 g / cm3, and its mass is 1.5-2 times that of the sun, The temperature is below 300K, with rotation, but it is very slow, almost synchronous with the revolution. The main composition of the nebula is hydrogen, accounting for 71%, followed by helium, accounting for 27%, and other elements, accounting for 2%. This includes heavy elements and metallic materials flying from supernova explosion, as well as volatile substances and st. When the solar system primitive Nebula revolves around the center of the galaxy, it has angular momentum at the beginning. In the process of condensation and contraction, its rotation speeds up, so that its rotation is no longer synchronized with the revolution. Because the distance between the inner and outer sides of the nebula and the galactic center is different, it forms a velocity gradient when it makes Kepler motion around the galactic center, which is fast inside and slow outside, resulting in poor rotation, As the nebula continues to condense and contract slowly, the rotation speed of the vortex graally accelerates, and a large amount of material begins to converge to the center of the vortex, resulting in the increase of material density and gravity in the central region, forming the central gravitational region, As a result, the matter spins to the center under the action of gravity, and the condensation contraction of the nebula is graally replaced by the gravitational contraction. At this time, the nebula has shrunk from the original 3000 astronomical units to 70 astronomical units. After several billion years, the temperature of the nebula has dropped to tens of K, the material loss is large, and part of the material has escaped to the space
with the enhancement of the central gravitational region of the nebula, the matter spins down to the center, forming the nebula collapse and entering the fast gravitational contraction process. In the interior of the nebula, the matter falls rapidly from all directions along the direction of the vortex to the center, forming spiral material flow of different thickness. The nebula is also graally flattened, forming a wide brimmed cap like disk. The spiral material flow graally evolves into four spiral arms. As long as the angular momentum is not enough, it will not form a ring, only a spiral arm. From the front, it looks like a shrinking galaxy, forming a vortex structure. From the side, it looks like ngc4594 (M104). It shrinks unrestricted in the direction parallel to the total angular momentum axis, and collapses rapidly. The increased gravitational potential energy is transformed into the internal energy of matter, while the contraction is restricted in the equatorial plane. This is because the centrifugal acceleration weakens the gravity and makes the contraction slow, When the inner arm shrinks to 5.2 astronomical units from the center, the rotational speed graally reaches 13.1 km / s. The centrifugal force generated by rotation is in balance with the gravity in the center, and the arm stays at this position and does not shrink, However, the matter in the central region continues to contract rapidly, the central region and the spiral arms break, and the central region continues to contract to form the protosun, which accounts for 99.8% of the total mass of the astrological cloud, while the mass of the four spiral arms is less than 0.2%. At this time, the protosun still has a strong gravitational effect on the spiral arms, and the spiral arms also have a restraining effect on the protosun. The rotation of the protosun is delayed, and the rotation speed graally slows down, When the angular momentum of the original sun is transferred to the spiral arm again, the matter on the spiral arm will continue to spin down to the center as long as the angular momentum is insufficient, but it can not go down again when it reaches the inner spiral arm. Therefore, the matter in the inner spiral arm accumulates more and more, while that in the outer spiral arm decreases relatively. When the four rotating arms reach Kepler orbital velocity one by one, they evolve into four circular rings. The circular rings are distributed according to the Titus Peter rule, and their angular momentum accounts for 99.5% of the total angular momentum of the star cloud in the orbital positions of wood, earth, sky and sea, respectively. This is the reason why the angular momentum distribution of the solar system is peculiar. The Laplacian ring formed in this way does not have the difficulty of insufficient angular momentum. The central region collapses into the original sun, the density of matter increases, the collision between molecules is frequent, and the internal pressure graally increases, which makes the matter in the core squeeze together to form the star core and release a lot of energy. With the increase of central temperature, the increased heat energy spreads outward through convection, and the star presents a slightly exothermic state, The whole nebula is similar to Orion KL infrared source. The rapid gravitational contraction process in the nebular period lasted for a short time, about thousands of years. We often say that the sun has a history of 5 billion years, probably from then on
variable star period (including slow gravitational contraction process and flare process): after the formation of four circular rings, most of the mass of the nebula is concentrated in the range of 1% astronomical units in the central region, resulting in the increase of material density, more frequent intermolecular collisions, higher temperature and higher pressure. When the internal radiation pressure and self attraction are nearly equal, the quasi fluid equilibrium appears. The star no longer shrinks or only shrinks in tiny pulsations. The prototype of the sun is basically formed. The center is a fast rotating solid star core, the outer core is the radiation region, and then to the surface is the troposphere. The protosun graally turns into a slow gravitational contraction process
the motion of matter inside the protosun is very complex. Because matter is a gaseous fluid, which is very different from a rigid body, there are many complex motion states in the rotation. Due to the action of inertial centrifugal force, equatorial matter tends to be flat. The matter at the two poles must flow towards the equator, and the matter at the poles decreases, but the role of gravity is to maintain the spherical level, Therefore, there must be material flowing to the two poles to make up for the lack of material there. As a result, eddy currents with different directions of rotation are formed on both sides of the equator, and graally approach the equator with the flow of material. This is the famous butterfly diagram. This state has been maintained until now, such as sunspot movement. With the interaction of matter convection and rotation, angular momentum transfers to the equator, resulting in the poor rotation of stars. The increasing of high density, high pressure and high temperature in the core disturbs the heat balance gradient, and the kinetic energy and heat are transferred outward through the mixing length. The lower temperature material sinks to form convection and develops into turbulence from inside to outside. When the central temperature rises to 2000K, hydrogen can not maintain the molecular state, but becomes an atom, and absorbs a lot of heat energy, which makes the pressure drop suddenly and can not resist the gravity. The central region collapses into a smaller and denser core, and proces strong radio radiation, which can pass through the rarefied part of the star and reach the surface of the star, thus forming some bright bars, This is the H-H object
there is not only heat energy proced by high-speed moving molecules, but also electromagnetic energy released at the atomic level inside the star. The core temperature is higher. Although the rotation of the star slows down, the star core still spins rapidly, and the plasma near the core region also spins rapidly. The star magnetic field is generated, and the magnetic lines of force pass out from near the two poles. At this time, the star proces radio radiation, The internal heat energy is continuously transmitted to the surface, and the surface temperature can reach 1000K, and emit red light. This kind of energy is transmitted from time to time, and the surface temperature will fluctuate from high to low, and the magnitude of stars will vary from large to small. Sometimes, when the energy accumulates to a certain extent, it will erupt violently and throw out matter. Within a few days, the magnitude can rise by 5 or 6 levels. This period is equivalent to Taurus T-shaped week or similar to Cetus uv-shaped week, which is the process of flare
the temperature in the central region of the protosun graally rises. When it reaches 800000 K, hydrogen is ignited and nuclear fusion occurs. First of all, hydrogen and deuterium fuse into a helium nucleus, procing photons and releasing a large amount of nuclear energy. If the energy suddenly increases by a thousand times, it will proce violent eruption, and the brightness of the star will suddenly increase by many times. This is the flare or Nova explosion, and the protosun enters the process of flare, During this period, there were several violent eruptions, releasing a lot of energy and ejecting material, and taking away part of angular momentum. There were four relatively large eruptions. Because the mass of the sun is not too large, there will be no more comprehensive eruption, just a local eruption
the eruption starts from the nuclear reaction zone inside the star, where the core spins very fast, reaching hundreds of kilometers per second. Matter has extremely high energy, so the ejecta is high temperature and high speed. The mass of the first ejecta is about 3 parts per million of the mass of the sun. The temperature is more than 10000 degrees, and the ejecting speed is as high as 616.5 kilometers per second. It is in a molten semi fluid state, spinning at a high speed, and decelerating while cooling when flying away from the original sun, When it reaches the current Venus orbit, its speed is just in sync with Kepler's, it will stay in orbit and orbit around the original sun. Only a few decades later, the protosun erupted for the second time. The ejecta was slightly more than the previous one. It was still in a high-temperature melting state, spinning at a high speed, and its initial velocity was slightly higher than the previous one. When it entered the current earth orbit, it would orbit the protosun. Hundreds of years later, the protosun erupted again for the third time. At this time, the temperature of the star's nucleus further increased, reaching 3 million degrees. Nuclear reactions such as deuterium, lithium, beryllium and boron took place, releasing more energy. The ejected material was not as much as the first two times, but the initial velocity was higher. The largest mass entered the current Mars orbit, and more fragments were scattered between the orbits of Jupiter and Mars, After three eruptions, the protosun was in a state of temporary rest for thousands of years, but the central temperature of the star continued to rise. When it reached 7 million degrees, the protons proton reaction of tetrahydrofusion helium took place, releasing a large number of photons and energy. The protosun erupted violently for the fourth time. This time, the mass of the eruptions was 2% of the sun's mass, and the initial velocity was higher than that of the previous three times, So flying further, a larger ejecta impacts on the edge of Uranus, and the splashed material fragments reach the orbit of Neptune. More fragments are all over the space of the solar system, and some fly out of the outer side of Neptune. At this time, the surface temperature of the original sun rises to thousands of degrees, and it emits heat and light. A shining star is about to be born. The protosun is about 400 million years old in the period of variable stars
ring the main sequence star period (including hydrogen combustion and helium combustion), the protosun graally stabilized after several flares, entered the hydrogen combustion process and released nuclear energy. The temperature of the nuclear reaction zone in the center of the star's core can reach 15 million degrees, and the nuclear reaction appeared carbon nitrogen cycle reaction, but the temperature was high

8. There are three basic types of currency in the wizarding world:
jinjialong
yinxike
tongnat
there is a circle of numbers on the edge of Jialong, which is the number engraved on the goblin of gulinger coins. We don't know if SIKO and Nate have the same number, but it's likely that they do
to facilitate your calculation, we provide the wizard Muggle coin converter
if you don't use a calculator, the conversion of these coins is a bit complicated for Muggles, but it's easy for witches. Hagrid said: "the gold coin is a gallon, 17 silver Sikes for one gallon, 29 Nath for one Sike. It's simple enough." So 1 gallon = 17 SIKO = 493 NAT
JK Rowling said in an interview (CR) that according to her estimation, the value of a gallon is "about 5 pounds", or 7.33 dollars. In the introctions of Quidditch and magical animals, it is mentioned that 250 billion US dollars is equal to 34 billion galleons. That is, one gallon = 5 pounds = 70 RMB

from the Internet.