What is the difference between smog and fog and Iceland Norway that the sun shines by midnight?

In everyday life, many scientific phenomena occur with us, which we ignore, or we do not know them, we will learn about the hidden science behind some of these things-

1. What is the difference between smog and fog?2. It is said in Norway that the sun shines by midnight. Is this true?3. Why do not birds fall down while sleeping?4. Why are spirits applied before injection or needle5. The gas metal is made of which thread and why it shines.

Smog Vs Fog

1. What is the difference between smog and fog?

The fog is formed in the humid air, its process of formation is like clouds, cold air absorbs more moisture than the hot air. Water particles are seen as fogs. Air also takes moisture from steam. The part of the cloud that is close to the ground is actually a fog. The fog is formed in many ways, it is largely given the name of the advection fog and radiation fog. Smog word is made from smoke. That is, when the smoke is also included in the air, it is called smog. Some fogs and fogs have also been found in the fog when the abundance of polluting smoke is called smog.

2. It is said in Norway that the sun shines by midnight. Is this true?

Norway is very close to the North Pole. In this area, in the summer the sun shines by the night and it is only a few hours, during that time the sun is close to the horizon, so the nights are not dark. That's why it is called half-night sunny country

3. Why do not birds fall down while sleeping?

When the bird sits on the putting of the tree, it binds them with the special texture of their claws, such as putting a bird or sitting on the wire, because of the burden of its body, the nerves of the claws are attached or attached to the wire firmly and Then when he has to fly then he has to make efforts in the same way as the way we have to try to hang. Sitting on the bird can sit comfortably because its texture does not let it fall. Not every bird got this quality Ostrich can never put on sleep, neither does the duck have different structure of their toes and they can sleep on the ground.

4. Why are spirits applied before injection or needle

Surgical spirits are used before injection. It is usually a mixture of methyl and ethyl alcohol. Methyl salicylate and ideoform are also used for this purpose, it is essentially dysfactate i.e. it is applied to eliminate the possibility of viral infection.

5. The gas metal is made of which thread and why it shines.

Gas metal is usually made of rayon or silk fabric. It is refined with metal nitrate, it becomes a metal oxide mesh when it is heated when metal oxide shines. Thorium dioxide is the main element when it comes to hot flames, it shines. In a time the streets of Europe were lighted on this. Even today it is used in the forests or far off campuses