KNOW WHY CHARGING CABLES ARE SHORT IN LENGTH !

I bet you face the problem of your phone charging cable being short. Have you imagined why mobile manufacturers provide short charging cables? We will explore the reason behind the reason for short cables in this article.

There is science behind the shorter charging cable as companies like Apple and Samsung spent countless hours on their design.Before we go any further we need to establish if the iPhone cable is actually short. So how long is it? The standard cable you receive in your sleek minimalist white box is one metre long.

Following are the reasons why charging cables are short:

1.)Cord length is short is to safeguard us from SAR radiation which smartphone emits while charging. It can be dangerous to talk while charging is on. If the cable is short chances are less that people will use their phone while charging.

2.) The long charging cable will offer more resistance to current. When resistance increases,the current (charging current) decreases.Thus, increase in length of the wire will result in decrease in the charging current, making the charger inefficient.

3.) These cables are kept as short as possible while still being useful. Most smartphone chargers today are designed to be plugged into the USB port of your computer, with the wall adapter as an afterthought, and 6 feet is usually enough to reach the computer sitting on your desk or in your lap. It saves on material and packaging costs, while also avoiding the tangling that long cables are prone to.

4.) They are short because the manufacturer will usually make a longer cord to be purchased separately.


It is highly recommended that you use adapter and charging cable that is compatible with your phone. Changing the compatibility my harm your device and even result in explosion.

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KNOW THE FUNCTION OF BUTTON ON THE DOOR HANDLE OF CAR !

You might have seen a small button on the car handle. You might have imagined why this button is for and how it works? We will explore this in this article.

These days a lot of advancement is going on in Automotive field. Every automobile company is developing some technology to make the life of user comfortable.The button that you see on the car handle is known as Request Switch or Request Sensor.This technology allows you to lock and unlock the door just by pressing the Request Switch on the door when you are carrying your key on you. 

You can also open and close the trunk, and can start the engine without having to insert the key, making departure seamless. When you press this button the car sends out a signal searching for the owner, or key fob. When the key fob receives the specific signal, it replies that it is within radius and unlocks the doors for the owner.

Which means you just have to keep  the key in your pocket and press this request switch and you will be able lock and unlock your car door. There is also a same switch at the trunk side.

HOW THIS TECHNOLOGY WORKS:

Intelligent Key utilizes antennae that transmit signals between the car and the key, and a tuner that receives the signals. Pressing the Request Switch transmits a signal from the car antenna, and the key that receives the signal then automatically returns a signal. The car tuner receives this signal and then locks or unlocks the vehicle.

In order to avoid a key being locked up inside the vehicle cabin or trunk, the technology detects the status of the door lock and whether the key is remaining inside the vehicle at the moment when the door or trunk is closed. If it detects that a key has been shut inside the vehicle, it alerts you via a buzzer and simultaneously automatically unlocks the door or opens the trunk.

You can quickly determine if a car has touch-sensitive door locks installed. Take a look at the driver-side door. If no handle or lock are visible, then you can be sure that the car has a touch-sensitive lock installed.

KNOW WHY WHITE PACKETS ARE USED IN NEW PRODUCTS !

We’ve all seen those little white packets that come in the box when we buy a new pair of shoes, a bottle of vitamins, a bag or a new purse. You might be wondering what this white packet is and what is it used for? Let us discuss all these questions in this article.

These little white packets are called silica gel bags. The technical name for it is silica xerogel, but most people just call it silica gel.These bags are filled with a substance called silicon dioxide, a non-toxic inert desiccant that has the power to dry out moisture.Silica, or silicon dioxide (SiO2), is the same material found in quartz. The gel form contains millions of tiny pores that can adsorb and hold moisture. Silica gel is essentially porous sand. Silica gel can adsorb about 40 percent of its weight in moisture and can take the relative humidity in a closed container down to about 40 percent. Once saturated, you can drive the moisture off and reuse silica gel by heating it above 300 degrees F (150 C).

Silica gel packets are used to absorb moisture and keep things dry.

Many manufacturers add these desiccant packs to their new products to keep them fresh and moisture-free for the consumer.In leather products and foods like pepperoni, the lack of moisture can limit the growth of mold and reduce spoilage. In electronics it prevents condensation, which might damage the electronics. If a bottle of vitamins contained any moisture vapor and were cooled rapidly, the condensing moisture would ruin the pills. You will find little silica gel packets in anything that would be affected by excess moisture or condensation.

So, now you know why these packets are used in new products. You also knew how these bags work. Thank you for reading the article.

KNOW WHY BOWLERS RUB BALL IN CRICKET MATCH !!

While watching cricket match you might have seen bowlers rub the ball often against their trousers. Have you even wondered why bowlers do so? We will discuss the reason behind the rubbing of ball in this article.

Actually, whenever you rub the ball, no umpire or match referee tells you anything. At the same time, if you violate the ICC rules while rubbing it, then you also have to pay its loss. Let us first tell you why the bowler does this. Whenever the ball is new, it falls straight, very little swing (out swing, in swing or reverse swing) is found. In such a situation, only the batsman gets the benefit which no bowler wants.

Bowlers try to make the ball shine and smooth mainly for making it to slip on the bat and make it possible to render the batsman out by catches at slips and by the wicket keeper. The smooth ball is also likely to misbehave while it is hit for a bigger shot and are caught anywhere in the field an on boundaries.

Now,let us understand the science behind this.

When bowler is rubbing one side of ball he is actually polishing or smoothening the surface of the ball. Other half of the ball remains as it is or more rough. When bowler throws the ball at high velocity, low pressure is created near smooth surface and high pressure area is created on rougher side. This pressure differential SWINGS ball in air.

To look at this aerodynamically, one must understand the concept of boundary layer formation and separation. Boundary Layer is a layer of fluid (in this case, Air) which tends to stick to the surface of the object (The ball) when the object tries to move through the fluid. The boundary layer does not cause any effect on the object’s flow through the fluid (except for resistance) until it separates. Boundary layer separation occurs when the flow velocity increases to such an extent that the pressure difference increases drastically in the flow direction. Boundary Layer separation causes formation of eddies which then resist the movement of the flowing object. The Boundary Layer formed on any surface can be either Laminar or Turbulent. 

In Laminar Flow, the flow of the fluid is in organised parallel lines. Whereas, the Turbulent Boundary Layer the fluid particles move in disorganized and intersecting paths.Therefore, ball is made rough so that turbulent boundary layer is formed which results in disorganized movement of ball.

In conclusion, we have seen that science behind rubbing the ball.Thank you reading the article.

KNOW WHY VENTILATIONS ARE PLACED AT TOP OF THE ROOF !

We see doors and windows in our room in daily life. They are placed in such a way that we can pass through them easily. But, when we see ventilation, they are always placed at the top of the room. Have you ever imagined why are they placed on the top, why not near the window? We will discuss why ventilations are placed on top of the roof in this article.

Ventilations are basically window like structure that is used to pull out hot air in a room. Ventilation moves outdoor air into a building or a room and distributes the air within the building or room. The general purpose of ventilation in buildings is to provide healthy air for breathing by both diluting the pollutants originating in the building and removing the pollutants from it.

Ventilators are kept at the top of the roof to pass the hot air inside a room to pass outwards. As hot air is lighter than cold air relatively, it goes up near the ceiling & passes through ventilators as a result cold air finds its way to come in to fill the room. Hence, this ensures a circulation of air inside a room. Also, ventilation at the top ensures an ample amount of sunlight to enter into the room.

During night time, ventilators allow the cold air to flow inside the room. It also secures the oxygen level in a crowded room by circulating air. 

Home ventilation is important to keep the house and its occupants healthy and comfortable. Ventilation is a key component to maintaining proper indoor air quality. Ventilation keeps air flowing through the home, eliminating contaminants, moisture buildup, and odors.

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KNOW WHY TRAIN ENGINES ARE NOT TURNED OFF AT PLATFORMS !

You might have noticed that diesel trains are never turned off. They are always left running when they are on platforms for 30 or 40 minutes. Have you ever wondered why would the railway department waste so much fuel if the train isn't moving! It seems a bit strange, right? We will discuss the reason behind this in this article.

1.) Every diesel engine has a battery and this battery is charged only when the engine is running, if this battery is not charged then the loco motive system of the train can fail. It takes about 20 minutes for the engine to restart when the red light comes on the way or if the diesel engine of the train is stopped for any reason. Apart from all this, a lot of diesel is required to start a diesel engine.

2.)If the engine is turned off for long periods of time, it takes another long span of time to repressurise (as compressors take power from the engine) the brake lines. Trains, being large and heavy, need the optimal brake line pressure for its efficient stopping. For obvious reasons, loco pilots never compromise on brake line pressure.

3.)If the engine hasn't been started since long (or, if the engine is cold), it takes quite an effort to restart it. Depending on the size and construction of the engine, it can take 10 to 20 minutes just to start it.

4.) In some countries a diesel locomotive also provide hotel load to the coaches powering the air-conditioners, lights and pantry.

5.)Diesel engines don't really use that much fuel when idling, especially compared to the potential problems caused by shutting them down, so the engines are left running unless the train is being berthed for the night.

Today's trains have ‘Auxillary Power Unit (APU)' in order to reduce the fuel consumption while idling. This is a separate system for powering all the electronics, and is also found in aeroplanes. APU can also help in reducing the emissions in diesel locomotives.

It is clear from above points that engine is not shut down to save diesel consumption. Now you know why the diesel engine of the train is not stopped. Let us tell you that in coming time we may not get to see the diesel engines of the train, because diesel engines are being tried to replaced with electricity and this will benefit both the railways and the environment.

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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.

KNOW WHY GASKET IS USED IN ENGINE !

You might have seen a rubber or strip like structure when you disassemble an engine.This rubber like structure is called gasket.We will know the importance of gaskets in engines in this article.

A head gasket is a mechanical seal that sits between the engine block and cylinder head(s) in an internal combustion engine.Modern vehicles are commonly manufactured with an engine block and a cylinder head bolted on top, which makes a head gasket a critical seal. This important component is situated between the engine block and cylinder head. It is a machined casting for an internal combustion engine, designed with cylindrical bored holes for hosting the pistons. A head gasket performs the task of a seal between the engine block and cylinder head.

The head gasket in modern vehicles is comprised of several layers of steel material entwined with elastomer, making them more durable and longer lasting. Vehicles produced in the past were equipped with gaskets created by graphite or asbestos. In comparison, today’s gaskets are better as they are less prone to leakage and have little to no health risks as opposed to asbestos produced gaskets.

The main functions of head gasket as as follows:

1.)The gasket joins irregular surfaces (we speak in terms of millimeter microns). For this reason, it is necessary to insert a softer material, such as a fiber or an elastomer between both surfaces which is able to adapt to those imperfections, which ensuring a perfect sealing.

2.)It maintains the sealing need and prevent leakage between the two crucial engine parts, when being subjected to the compression process.

3.)The gasket performs the task of separating the passage of oil and water that pass through the block and cylinder head of the engine.The head gasket keeps the chambers separated to ensure there is no cross-contamination of fluids.


4.)It prevents dust and dirt from getting into the engine and causing damage.

Various materials can be used in the manufacture of gasket: rubber, silicone, metal, cork, fiber or polymers.On certain occasions it may be found that the compression in the cylinder creates a perforation, or hole in the head gasket; generally known as a blown head gasket.

When the head gasket has blown, it’s critical that it be addressed immediately. Continuing to operate a vehicle with a blown gasket can cause serious and irreparable damage to the engine. When gasket is blown, you may notice a few or all of the following symptoms:


>Overheating – Caused by a lack of or reduced coolant. Also caused by hydrocarbons entering the cooling system.

>White, Blue, or Grey smoke – Indicates coolant or oil has entered the combustion chamber.

>Loss of Power – Due to a lack of compression resulting in sputtering, loss of power, and reduced fuel efficiency.

>Discolored Oil – A chocolate milk-looking oil is indicative of coolant mixing with oil in the engine.

So,next time when you face above problems, do not forget to check your gasket once.Thank you for reading this article.

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