How to calculate the Coulomb force between two balls

1. This is AMD's video card.

2. For blockchain technology, there are mainly three types: public blockchains, consortium blockchains and private blockchains. Their concept tips are as follows:
public blockchain means that any indivial or group in the world can send transactions, And the transaction can be effectively confirmed by the blockchain, and anyone can participate in the consensus process
instry blockchain: multiple preselected nodes are designated as bookkeepers within a certain group, and the generation of each block is jointly determined by all preselected nodes (preselected nodes participate in the consensus process). Other access nodes can participate in the transaction, but not the bookkeeping process
private blockchain: only the general ledger technology of blockchain is used for bookkeeping. It can be a company or an indivial, and only enjoys the write permission of the blockchain. This chain is not very different from other distributed storage schemes.

3. Each main network has its own blockchain network. They can limit the blockchain network according to the application scope and their own needs. At present, according to the degree of openness, blockchain can be divided into three categories: public chain, private chain and alliance chain
each chain has different operation efficiency, security, node oriented and permission. Public chain, represented by BTC, any node can read, send and confirm transactions, or participate in bookkeeping right contention, and can be detached or offline at any time, which truly achieves complete decentralization
the transaction data on the public chain is open and transparent, and is not easy to be tampered with, but it also has the disadvantages of slow confirmation speed and low TPS (throughput). Private chain, taking XRP as an example, if the read-write permission is controlled by an organization or institution, the openness of the chain will be determined according to its own needs. Private chain transaction speed is faster, the cost is lower, can better protect the privacy of participating nodes. Generally, it is more suitable for the government and enterprises, open to the departments in need, and accept supervision
alliance chain, taking hyperledger as an example, only the permissions of nodes joining the alliance are open. Some internal nodes will be determined for bookkeeping, while other access nodes can view block information and participate in transactions, but they have no right to bookkeeping. Alliance chain reces the cost of consensus, is more open than private chain, and has strong controllability. Although there are different types of blockchain, they all have their own unique advantages. Demanders can choose different types of blockchain according to the actual application situation, so as to make the best use of everything.

4. Board games for 2-4 people, right. I don't want to drag words. Specifically, one person can perform an operation. He can choose to move a step for his own villain or put a baffle, but the baffle can't completely block the other person's way. If you want to go where there is a villain of the other party, you need to put your villain on the left or right side of the villain
each person starts from his own side, and the goal is the other side. If there are four people, that is, South, north, East and West, who will go to the other side first, who will win

you should understand. I hope you can adopt it

5. It's irresistible to retire. It's impossible to retire in my life.

6. Are you water ID

7. Magic box m10-tmb300 ＞ 1s + - M10 ＞ youth version-m11 ＞ 1s-tmb200ra white commemorative version. From the figure, we can also find that the youth version-m11 and the 1s-tmb200ra white commemorative version are both A7 quad core, but the video performance of Quan a31s is better than that of mtk8685. Therefore, for the box, if the M11 and 1s have the same price, we should choose a31s 2200ra.

8. < UL >

onerootoneroot co builder program is a blockchain project, full name is "oneroot co builder program", which aims to gather instry resources, uphold the development concept of co construction, sharing, win-win and consensus, and build the ecological infrastructure of blockchain. The RNT you mentioned is its token, which is now in circulation

this project is different from the general blockchain projects, which only focus on one, but to build the blockchain ecology. In the oneroot ecosystem, it includes Multi Chain Wallet rootoken (currently supporting erc20 token and Neo token based on Ethereum) rootoken wallet; Rootrex decentralized exchange (including the exchange embedded in the wallet app and the exchange on Unicom's website, whose R & D is now in the closing stage, and the commercial version will be launched at the end of June) rootrex exchange; Smart economy (smart agent investment, still waiting for the approval of Canadian financial license) icoroot; R1 decentralized transaction protocol (development has been completed, not open source) R1 protocol; RNC public chain has started trial operation and is expected to go online in September. In the future, decentralized exchanges will be moved into RNC public chain to gain better use experience and build a centralized exchange. At present, it has reached cooperation with the state digital right administration and Shanghai Music Valley Group to provide technical support in digital storage, right confirmation and right transfer; Renewable energy, health data management and smart medical system are also being actively promoted; Blockchain instry Incubation Park (located at No. 300, Tongbei Road, Hongkou District, Shanghai, with an area of 5000 square meters, is used for the incubation of oneroot ecological projects)

9. Limited pleasure, easy to catch "activity
activity time: June 2-july 30 (0:00-24:00 every day)
collection time: July 25-august 2 (10:00, 16:00 every day)
activity rules:
1. During the activity, all players who complete the game twice in a single day through the line of fire, The next day can be found on the activity page http://cf.qq.com/act/a20110509gift/gift.shtml Get Limited gift bag
2. The time of getting gift bag is 10:00 and 16:00 on the next day, and 1 million props will be sent out on the same time
3. Each QQ number can only get one props every day. If you don't get one props on the previous time, you can continue to get them on the next time, first come first served until you finish
4. The contents of daily Limited gift bags are different, and the announcement time is 9:00 every day.
5. The game regions that receive gift bags and complete game tasks must be the same, otherwise they are not eligible, and they will be sent to your personal warehouse within 24 hours after successful collection
6. QQ members can also get extra rewards when they grab the Limited gift bag, including purple muzzle flame (7 days), soul enrance (7 days), ghost baby grenade (7 days) and air hammer (7 days).

10.

expensive. Generally around 1000 yuan

the quality of the glasses provided by Nanning optometry center is relatively good, so the price is generally higher than that of the special glasses shops on the market

extended data

precautions for glasses:

1. Examination

Professional ophthalmologists should be invited to check whether they should wear glasses<

you can go to the eye hospital to check your glasses,

see if you are true myopia or pseudomyopia,

only true myopia is suitable for wearing glasses,

pseudomyopia can recover if you pay more attention,

so you don't need to wear glasses in a hurry

2. The size of glasses

before matching glasses, we should first choose the glasses we like,

but not all beautiful glasses are suitable for us,

when choosing glasses, we should choose the comfortable glasses we wear,

especially, we should choose the glasses according to the size of our face,

it is the best to let the pupils of our eyes be in the center of the glasses

(3) optometry

one of the things you must do when matching glasses is optometry,

optometry can use the machine to detect the power and pupil distance of your eyes,

with these data, the matching eyes will be accurate

if you don't do optometry, the pupil distance is not accurate, which will cause headache when wearing glasses.

this is harmful to the eyes

4, degree

in the selection of matching degree, the doctor will add or subtract some degrees according to their measurement degree of your eyes

the amount of addition and subtraction depends largely on the comfort you feel when wearing it

therefore, generally, people who need to work at the desk are better equipped with a lower degree than their actual eyes,

while people who often work outdoors can be equipped with a higher degree

5. Lens

when selecting lenses, we should pay attention to the following points:

the material, color, thickness and purpose of lenses<

the most important thing is the thickness of the lens.

the higher the degree, the thinner the lens is needed to rece the burden of the glasses on the nose.

I suggest you use resin lens here, which is light, non fragile and practical