Luo Zhenyu talks about virtual currency
Recently, logic thinking & amp; The video of APP founder Luo Zhenyu talking about his investment in bitcoin was exposed again. In the video, Luo Zhenyu said that because he believed in the trend, he bought 100 bitcoins, which are now worth 3 million
LUO Zhenyu said that the simplest way to invest is: as long as you believe in the trend, you don't care after investing. It's more important to increase your ability to earn money
Unlike all currencies, 
bitcoin does not rely on a specific monetary institution. 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 the design of cryptography to ensure the security of all aspects of currency 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
on December 17, 2017, bitcoin reached an all-time high of $19850
the core content of Luo Zhenyu's 2020 New Year's speech is to take the basic disk as the key word LUO Zhenyu elaborated the meaning of basic disk from six aspects. The so-called basic disk refers to the things that can't be changed, seized or lost. In this speech, there are six teams supporting, which is equivalent to making six reports
all the knowledge is useful to us. We learn a little every day. Now many people like to do cross-border things, because more skills do not press us. Everyone does not dare to say that they have a 100% advantage in their own posts, and no one dare to say that they will not be unemployed how to make us invincible? Only by continuous learning, no matter how the years change, the knowledge in our memory will never change. We may forget the teacher, but we can't forget the knowledge that the teacher gave us< br />
there are two kinds of motion rotation and movement of magnet under the action of magnetic field, so there are torque and force acting on the object respectively. The calculation formula is extracted from Wiki:
t = u * B torque formula
F = ▽ (U * b) force formula (▽ stands for gradient calculus The content can be regarded as a special algorithm, that is, to make a specified treatment for UB)
where u is the fixed property of the magnet itself, which is called magnetic moment. It is unnecessary to explain the function of u here. As shown in the formula, for a certain strength B, it will proce a certain strength moment and force, which is calculated as vector calculation (iron has magnetic moment after being magnetized in the magnetic field)
according to the interaction between magnetic fields, that is, the interaction between two magnets can be considered as the force of a magnet in the magnetic field. Because the magnetic field distribution is uneven, we need to divide the magnet into micro elements. For each micro element that is small enough, we can think that it is in the same magnetic field as B, then calculate its torque and force, and finally add all the micro elements together To the total torque and force needle, for high school students, this algorithm is beyond the scope, only need to understand the mechanism
Calculation formula of magnetic field intensity: H = n × I / Le
In the formula, h is the intensity of magnetic field, and the unit is a / m; N is the number of turns of the excitation coil; I is the excitation current (measured value), unit a; Le is the effective magnetic circuit length of the test sample, in M The force of the unit punctual magnetic charge in the magnetic field is called the magnetic field strength H. Later, ampere put forward the hypothesis of molecular current, that there is no magnetic charge, the essence of magnetic phenomenon is molecular current. Since then, the intensity of the magnetic field is usually expressed by the magnetic inction intensity B. However, in the magnetization of magnetic medium, the magnetic field intensity H, as a derived auxiliary quantity, still plays an important role A static electron has a static electron mass and a unit negative charge, so it proces external gravitation and a unit negative electric field force. When the external force accelerates the static electron and makes it move, the external force not only provides kinetic energy for the whole movement of the electron, but also provides magnetic energy for the magnetic field generated by the moving chargeit can be seen that the magnetic field is the magnetic energy material injected into the moving electron by external force through energy conversion. The magnetic field proced by electric current or by point charge with negative charge is the macroscopic manifestation of the magnetic field proced by a large number of moving electrons
In the same way, the magnetic field generated by a moving positive point charge is the macroscopic embodiment of the magnetic energy material obtained by the excess proton from the external force. However, the magnetic matter is attached to the charged quarksmaterial of the spring) or 8, Coulomb force: F = K (applicable condition: the force between two charges in vacuum)
electric field force: F = EQ (the direction of F and electric field strength can be the same, It can be reversed)
magnetic force:
Lorentz force: the force of magnetic field on moving charge.
formula: F = QVB (BV) direction left hand rule
ampere force: the force of magnetic field on current.
formula: F = bil (BI) direction left hand rule
Newton's second law: F = ma or FX = max, FY = Mai
scope of application Understanding: (1) Vectoriality (2) instantaneity (3) independence
(4) homogeneity (5) homology (6) same unit system
because the problem is not clear enough, I can only give you some formulas
m -- mass, kg
X-specific magnetic coefficient of magnet (= K / P, k-volumetric susceptibility, p-density), M & # 179/ kg
H -- magnetic field intensity, t 1T = 1Wb/m²= 1N/(A·m)=1Kg/(A·s²)
V -- magnet volume M & # 179
gradh -- magnetic field gradient, DH / dl.
where: H is the intensity of magnetic field, and the unit is a / m; N is the number of turns of the excitation coil; I is the excitation current (measured value), unit a; Le is the effective magnetic circuit length of the test sample, in M
the force of unit punctual magnetic charge in the magnetic field is called magnetic field strength H. Later, ampere put forward the hypothesis of molecular current, that there is no magnetic charge, the essence of magnetic phenomenon is molecular current. Since then, the intensity of the magnetic field is usually expressed by the magnetic inction intensity B. However, in the magnetization of magnetic medium, the magnetic field intensity H, as a derived auxiliary quantity, still plays an important role.