On the night of April 26, 1986, the turbine generator was tested at the 4th power unit of the Chernobyl NPP.
It was planned to stop the reactor (the emergency cooling system was switched off as planned) and measure the generator parameters.
It was not possible to safely shut down the reactor. At 1: 23 a.m. Moscow time, an explosion and fire occurred at the power unit. The emergency was the largest disaster in the history of nuclear power: the reactor core was completely destroyed, the power unit building partially collapsed, and there was a significant release of radioactive materials into the environment
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There are different opinions about the online shopping. Some people think that it's not the best way to shop others disagree. Nonetheless, you should know some rules in order to safely shop online. First of all, it's really convenient because you don't have to go anywhere and you can buy anything you want just from your home. But sometimes the sizes can be different and you will get an oversized or vice versa a small thing that won't suit you. Secondly, you should be very attentive while shopping online. There are lots of websites that want to steal your credit card information. Be aware of what sites you visit and where you buy things. It is better to use verified websites because they are unlikely to any information for their own benefit. The next thing is that you shouldn't tell anybody your own information including password of different sites. Sometimes different sites can ask you for personal information but be aware of what you type and where. Though such things may make online shopping a bad thing, it's still a very convenient way of buying things. As I have already mentioned it's very practical as you don't have to go anywhere. The only thing you need is a device with Internet. Secondly, some shops sell exclusive things only online so there are no ways to get them at the shops. That is the second thing for the online shopping. All in all, it is up to you to decide how to shop. Some people prefer online shopping, others like to go to the shop to buy things. Nevertheless, you should be very careful with what you buy and where. Carefulness will definitely save you lots of money and time which is very valuable in the modern world!
1. Fire is one of the great inventions of mankind, because without fire people would not be able to live normally without it.
2. The wheel is one of the great inventions of mankind, because with the help of the wheel we can build a car to move.
3. Soap is one of the greatest inventions of mankind, thanks to soap people can survive for many more years.