Blockchain chicken ribs

1. Because it comes from money. Virtual money is bought with real money. So it's also called coin there.

2. Before I tell you the scope of application, I'll talk about the function of digital signature: digital signature uses the private key of digital certificate to encrypt the abstract of data, so as to ensure the integrity, authenticity and non repudiation of data

digital signature is the most reliable and key method to ensure the integrity, authenticity and non repudiation of data. Where it is needed, it can be applied
now the typical applications are: online banking, e-commerce, e-government, network communication, etc

3. Before 2020-07-28-8 o'clock, the ether currency has been basically horizontal for 48 hours

4. blockchain games are relatively weak at present. There will be no users if there is no profit, but if there is profit, it is doomed to collapse. Most blockchain games are combined with the mode of capital disk, dividend disk and head pulling, which has no real value

5. I guess I'm running away. I haven't delivered the goods now

6. I'm very optimistic about this! Learning application, is Xiao did not meet Xiao ah... Embarrassed to live!

7.

In the regulations on railway safety management implemented on January 1, 2014, Article 27 stipulates:

Article 27 railway line safety protection zones shall be set up on both sides of the railway line. The scope of the railway line safety protection zone, from the foot of the embankment slope, the top of the cutting slope or the outside of the railway bridge (including railway and road al-purpose bridge, the same below), is as follows:

(1) 10 meters for urban high-speed railway and 8 meters for other railways

(2) the high-speed railway in the residential area of suburban area is 12 meters, and other railways are 10 meters

(3) the high-speed railway in rural residential areas is 15m, and other railways are 12m

(4) in other areas, the high-speed railway is 20 meters and other railways are 15 meters

If the distance specified in the preceding paragraph can not meet the needs of railway transportation safety protection, the railway construction unit or railway transportation enterprise shall put forward a plan, and the railway supervision and administration institution or the local people's government at or above the county level shall delimit it in accordance with the proceres specified in the third paragraph of this article

extended data :

Article 28 railways designed to operate trains with a speed of more than 120 km / h shall be under closed management. Railway construction units or railway transport enterprises shall, in accordance with the provisions of the railway instry supervision and administration department under the State Council, set up closed facilities and warning signs within the scope of railway land

Article 29 it is forbidden to burn wasteland, raise livestock, plant trees and other plants in the railway line safety protection zone that affect the safety of the railway line and the driving lookout

it is forbidden to discharge sewage, mp garbage and other substances endangering railway safety into the railway line safety protection zone

Article 30 in order to build buildings, structures and other facilities in the railway line safety protection zone, borrow soil, dig sand, dig ditch, empty out operation or pile up and hang articles, it is necessary to obtain the consent of the railway transportation enterprise and sign a safety agreement, abide by the national standards, instry standards and construction safety specifications to ensure railway safety, and take measures to prevent the influence on railway transportation safety

railway transportation enterprises should send personnel to supervise the construction site

Article 31 If the existing buildings and structures in the railway line safety protection zone endanger the safety of railway transportation, necessary safety protection measures shall be taken; If safety can not be guaranteed after taking safety protection measures, it shall be demolished in accordance with the provisions of relevant laws

if the buildings and structures in the railway line safety protection zone are demolished, the plants in the railway line safety protection zone are cleaned up, or the legal rights such as mining rights obtained by others in the railway line safety protection zone according to law are restricted, causing losses to others, compensation or necessary remedial measures shall be taken according to law. However, the demolition of illegally constructed buildings and structures is excepted

Article 32 buildings, structures, equipment, etc. built or set up in the railway line safety protection zone and its adjacent areas shall not enter the railway construction clearance stipulated by the state

Article 33 the construction and establishment of places and warehouses for the proction, processing, storage or sale of inflammable, explosive or radioactive substances and other dangerous substances on both sides of the railway line shall comply with the safety protection distance specified in the national standards and instrial standards

Article 34 mining, quarrying or blasting operations on both sides of the railway line shall comply with the laws and regulations on mining and civil blasting, and meet the national standards, instry standards and railway safety protection requirements

if it is necessary to engage in open-pit mining, quarrying or blasting operations at the foot of embankment slope, top of cutting slope and outside of railway bridge, and at both sides of center line above railway tunnel, it shall reach an agreement with railway transportation enterprises

Article 35 it is forbidden to extract groundwater within 200m from the toe of embankment slope, top of cutting slope or outside of railway bridge on high-speed railway line

reference materials : Regulations on Railway Safety Management (Order No. 639 of the State Council) - Central Government Network

8.

The tension on the fixed pulley rope is equal to the gravity of the object

The function of the fixed pulley is to change the direction of the force, but it can't save the effort. So the tension on the fixed pulley rope is equal to the gravity of the object on the other side of the rope, but the direction of the force changes

extended data:

advantages and disadvantages of fixed pulley:

fixed pulley, which is physically defined as a pulley with fixed shaft position. When using the fixed pulley, although it can not save labor, it can change the direction of our force, and it also costs distance

the fixed pulley is a kind of fixed pulley, its fixation is not simply fixed, but the central axis of the pulley is fixed. The main advantage of the fixed pulley is that it can change the direction of the force. When we use the fixed pulley to pull a heavy object, it is not very good to use the force, but we can change the direction of the force to a direction that we can use very well through a fixed pulley

this makes it easy to pull the weight. The disadvantage of fixed pulley is that it can't save labor. In other words, we use the same force when we use the fixed pulley as when we don't adapt to the fixed pulley. But we can overcome its shortcomings with a simple pulley block