1. What is the full form of 3G and 4G?
Most of the time you have heard people saying that they have three G or four or 2G. But have you wonder ever that what are the full form of these words. So 1G means 1st generation, 2G means 2nd generation, 3G means 3rd generation and 4G means forth generation.
2. Why are the letter boxes in India are of red colour only?
Our ancestors used letter boxes to communicate. But in today's world the use of these boxes is decreased. You might have seen these boxes but have you ever questioned that why do these boxes are red in colour. The reason behind it is that the red colour is the most attractive and noticeable colour. To maintain the eagerness of people it is colored red.
3. Why do we say "hello" to start a conversation?
Whenever you talk to someone, you start the conversation saying hello. Even everyone say hello to start a conversation but have you ever questioned that why do we say hello? The answer is that when telephone was invented by Alexander Graham Bell he announced that everyone would say "ahoy hoy!"to start the conversation. But after some years Thomas Edison declared that everyone would say hello to start their conversation and there were some people in favour of "hello"and some work in favour of "Ahoy hoy!". But after some years due to unknown reason people adopted "hello" to start their conversation.
4. Why does the cow give white milk even after eating green grass?
Have you ever thought about the cow's milk's colour? We eat several food items of different colours but our blood colour is red this is due to our body structure. Most of the part of the food we eat is being excreted by us. Similarly, the grass eaten by the cow is being grinded in cows stomach into vitamins and minerals. These vitamins and minerals are being extracted at a place and the chlorophyll which gives the grass its green colour comes out in the form of shit.
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