DISCUSSION_Advantages and disadvantages of using Internet.

 

Nowadays almost everyone in the world have had a contact with computers. A great part of them has been using international computer’s net known as Internet.
I think using internet has more advantages then disadvantages. 

THE ADVANTAGES :
 First of all, Internet provides access to a lot of information. Some of them are very useful in your job other helps in your hobby. Searching the net with Google, you can find everything you want. You can also do shopping using Internet. Of course it has no sense to buying a roll, but if you need something inaccessible, you will be able to buy it in Internet shop. You need only to select what you want, fill in some forms and click ok. In a few days you will get what you have ordered directly to your home, without going anywhere. You can pay with your credit card, pay postman when you get the package, or transfer money from your bank account. Nowadays almost every bigger bank offers transferring money with Internet. It is more faster then going to the bank and filling blankets. Transferring money in traditional way takes about a day, using Internet you can do this in few seconds even in Saturday and Sunday evenings. What’s more internet banks give you insurance against unauthorized transaction. Some people thinks that their money can by easily stolen by hackers. It isn’t true because the easiest way to steal your money from internet bank is breaking to your house and stealing you card of codes. Internet banks have very good protections witch make them practically unbreakable.
Next advantage of internet is email. Internet mails get in a few seconds in their destinations. It is very important when you want to send something for example to Australia. Of course you can send not only texts. You can email whatever you want, movies, photos, songs, computer programs etc. Costs are very important advantage of emails. Sending an email is much cheaper then phoning, or sending normal letters.



THE DISADVANTAGES :
 

Beside a lot of advantages, Internet has some disadvantages too.
First of disadvantages is that people who spend too much time sitting in the front of computer can easily gets ill. Radiation emitted by computer’s screen is harmful to eyes. People who spend too much time at their homes (because they needn’t go anywhere, they can do everything using Internet) are getting weaker. Sitting a for long time is also harmful to the spine.
Second disadvantage is that Internet can by addictive. Some people just can’t live without it. They have no real friends and when Internet is down they are getting furious.
Internet has some opponents but more and more people treats Internet like telephone, or radio. They use it for fun and work, and I think at present living without internet would be quite difficult.



source :

http://www.sciaga.pl/tekst/46949-47-advantages_and_disadvantages_of_using_internet

EXPLAINATION_How Does Snow Form?

Starting from the water vapor that gathered at the Earth's atmosphere, collection of water vapor cools to the point of condensation (is the temperature at which the gas turns into liquid or solid form), then agglomerate to form clouds. At the beginning of the formation of clouds, its mass is much smaller than the mass of air so that the clouds are floating in the air? just like the wooden beams that floats on the surface of the water. However, after the vapor collection continues to grow and merge into the cloud, its mass also increases, so that at one time the air could no longer hold. The clouds broke and the water particles fall harmlessly to Earth.

The particles of water that falls it is pure water (not contaminated by other particles). Pure water does not immediately freeze at 0 degrees Celsius, because at that temperature changes from liquid to solid phase. To make the required freezing temperature of pure water is lower than 0 degrees Celsius. This also happens when we put the kettle, the water evaporates when the temperature is above 100 degrees Celsius for at 100 degrees Celsius is the phase change from liquid to vapor. To accelerate the phase change of a substance, usually added special substances, such as salt is used to accelerate the melting of ice into the water phase.

Usually the air temperature just below the cloud is below 0 degrees Celsius (the temperature depends on the altitude above sea level). However, low temperature alone is not enough to create snow. When the particles of pure water is in contact with air, then pure water was contaminated by other particles. There are certain particles that serve to accelerate the freezing phase, so that pure water quickly into ice crystals.

Impurity particles are involved in this process is called nukleator, in addition to functioning as a promoter of freezing phase, also adhesive antaruap water. So that the particles of water (which is not pure anymore) joined together with other water particles to form larger crystals.

If the air temperature not to melt the ice crystals, ice crystals falling to the ground. And this snow!

source :

http://www.ehow.com/how-does_4563981_snow-form.html