KNOW WHY THERE IS A HOLE IN PLASTIC STOOLS !

We see many products in our day to day life as the need for four legs, and we understand that the legs are in an L shape to strengthen it. But, you might be wondering why there is a hole at the top of each chair or stool. We will understand the scientific reason behind the hole in this article.

In fact, there are definitely some great reasons for this design!

1.) If no holes were present, the chairs will get stuck easily when stacked because of the air pressure caused by the “vacuum” formed within the gap of two chairs.

2.)It's to save materials, which means spending less money and also making more chairs/stools at the same time.

3.)It is a finger hole for you to move and stack the chairs/stool more easily. 

4.)The holes in plastic stools are round and not square for a reason. It’s to maintain the structural integrity of the stool and to prevent it from breaking when you sit.

Also, plastic is tough. When an overweight person sits on it, the plastic will extend in all directions, and the hole can accommodate a weak extension. It seems to make sense.

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KNOW WHY "ABCD" KEYBOARD IS NOT USED !!

QWERTY refers to the arrangement of keys on a standard English computer keyboard or typewriter. The name derives from the first six characters on the top alphabetic line of the keyboard.You might be wondering why ABCD arrangements of keys is not used on keyboard.We will discuss the reason behind this in this article.

The arrangement of characters on a QWERTY keyboard was designed in 1868 by Christopher Sholes, the inventor of the typewriter.When it was first invented, they had keys arranged in an alphabetical order, until configuration was desired over convention.But people typed so fast that mechanical character arm of typewriter got tangled up and it needed to be rectified everytime. So, keys were randomly positioned to actually slow down the speed of typing and preventing the key jams. 

The researchers then struggled for the next five years to perfect this invention, making many trial-and-error rearrangements of the original machine’s alphabetical key arrangement.They came up with QWERTY keyboard arrangements.

Contrary to popular belief, the QWERTY layout was not designed to slow the typist down, but rather to speed up typing by preventing jams. Indeed, there is evidence that, aside from the issue of jamming, placing often-used keys farther apart increases typing speed, because it encourages alternation between the hands.

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KNOW WHAT DOES COLOUR CODING ON NUMBER PLATE MEAN !

As per the Motor Vehicles Act of 1988, no vehicle can be driven by any person in public places in India until it is registered by a registering authority. When the registration process of a vehicle is complete, it is assigned a number plate which is known as the official number plate. There are various types of number plates in India.Every number has a different colour coding which signifies a unique meaning.We will understand the meaning of various number plates and their meaning in this article.

A license plate is a combination of alphabets and digits that form a registration number. The license plate is issued by the district RTO (Regional Transport Office) and should be placed in the front and the back of the vehicle with provision for illumination. The international registration code for India is IND.

DECODING A NUMBER PLATE:

VARIOUS COLOUR CODING FOR NUMBER PLATE :

There are various parameters that decide which vehicle bears which coloured number plate.

White number plate with black lettering

Cars bearing black lettering on a white background are private vehicles. These are used solely for private purposes and can't be used for any commercial purpose like goods transport, ferrying passengers etc.

Yellow number plate with black lettering

These are commercial vehicles like taxi, cabs, trucks. Yellow number plates have a different tax structure compared to white number plates and commercial car drivers with yellow plates are also mandated to have a commercial driving permit.

Black number plate with yellow lettering

These are commercial vehicles available on rent for self-drive. These cars can be put to any commercial purpose without the limitation of the driver having to own a commercial driving permit.

Green number plate with white lettering

This number plate is limited to electric cars only. This is applicable to road-legal electric buses and other electric commercial vehicles (like Mahindra e20, Tata Tigor Electric,Tata Nexon EV).

Red number plate with white lettering

The red registration plate is issued as a temporary registration for a brand new vehicle until permanent registration us issued by the RTO. Temporary registration is valid for 1 month only. However, all Indian states do not allow temporarily registered vehicles to ply on road.Also, the vehicle is being used by the President of India or any of the state governors.

Blue number plate with white lettering

A blue coloured number plate with white lettering is issued to a vehicle belonging to a foreign diplomat United Nations (UN), Diplomatic Corps (CD) or Consular Corps (CC).

Number plate with an upward-pointing arrow

Military vehicles follow a unique numbering system unlike any other license plate numbers. The numbers are registered under the Ministry of Defence, New Delhi. The first/third character is an upward-pointing arrow, known as a Broad Arrow, used in many parts of the British Commonwealth. The two digits succeeding the arrow show the year in which the Military procured the vehicle.

Overall, a vehicle plate number has lot of components which are essential for any driving license holder to know.