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.