Facts for U

How does a ZIPPER works??

A Zipper or Zip fastener is a mechanical device used for closing two open ends of fabric or any material. This small piece of engineering has a lot of applications. It is even used in Space suits and Pressure suits developed by NASA.

The zipper consists two rows of teeths facing each other with a small offset. Each teeth is not placed exactly opposite to other teeth; It is misplaced by a small distance.

Why February month has the least number of days?

February being the second month of the year, has the least number of days. How was February chosen to have the least number of days?

The present day calendar which is used worldwide today, is called the Julian calendar. The original calendar has the same 12 months and 365 days a year and 366 days for a leap year. When the calendar was first introduced; March 1 was celebrated as the new year because march was the first month of this original calendar. So February was the last month and it was allotted with the remaining number of days. This is why February has the least number of days. February remained as the last month of the year until 450 BC when it became the second month of the year.

Many kinds of liquids are transported by road and railway. The tanks carrying these liquids are made cylindrical in shape and not cubical. Why is this so? If tanks are made in cube or cuboid, the capacity of the tanks will increase and they can hold more cargo. Even the large tanks used in refineries for holding the petroleum products are cylindrical in shape.

Soft drink and soda bottles, especially those made of plastic are not flat bottomed. The foot of the bottles usually has 5 bumps (corrugation). The bottles are not designed so to give it a fancy look. This post details you about the engineering in bottles. You will not find these bumps in water bottles or juice bottles. Water bottles have small indents to improve the stability of the bottle.

The bumps or the corrugations in the foot of the bottle increases the strength of the bottle. Take a sheet of paper and fold it. You can easily fold the paper. Now bend any one side of the sheet and try to fold it. You will now feel some resistance. Now, roll the paper into a pipe and try folding it. It will be little hard to fold the paper pipe. Bending any material increases its strength and rigidity. This is because; rolling the paper increases its moment of inertia around the bending axis.

Where does the water dripping out of your Air Conditioner come from?

The water dripping out is same as the water droplets which forms over a cold water bottle when it is placed outside the refrigerator. The moisture which is present inside the room gets condensed and comes out of the air conditioner as water. You may ask whether it is necessary to remove the moisture present inside the room. The answer is YES.

Our living condition is greatly affected by the moisture level in air. Our body gets cooled by sweating. Sweat evaporates by taking away the heat from our body. If the moisture content in the air is very high, body sweat cannot evaporate easily and so our body will not get cooled effectively. This makes us feel very uncomfortable. This is why we feel uncomfortable even in a cloudy day in coastal areas and sometimes after rain. This is all because of high levels of moisture in the air.

You would have never thought that Lying is difficult. But yes, it is. This is because you don’t have direct control over your Subconscious mind. Our subconscious mind controls our body language which lets others know that you are lying. So if you are good enough to control your Subconscious mind, even a body language expert can’t find out your LIE.

When you lie, you think of the TRUTH and create a LIE on your own. While you lie, the words what you speak and thoughts in your subconscious mind Clash with each other. Because of this lie the subconscious mind sends out nervous energy to various parts of our body which appears as a GESTURE or some movement of any part of your body.

Pigeons were used for communication as early as 1150.It is said that the Persians and Egyptians were the first to use MESSENGER PIGEONS. Pigeons were effective as messengers due to their natural HOMING ABILITIES.This method was used before the use of TELEGRAPHS. Pigeons were used by kings for sending urgent messages. They were even used during Franco-Prussian war and as military messengers during World War II.

WHO SHOWED WAY TO THESE PIGEONS? How did these pigeons knew their way to their destination?? How long and how fast can they fly?? You will know the answers for all these questions after reading this POST.

Need of Air Conditioning for Electronics

Electronic equipments are very sensitive. Most electronic equipments are kept in an Air conditioned room to protect them from high humidity and over heating.

Air Conditioning is different from air cooling and refrigeration. In refrigeration and air cooling, only the temperature is lowered. In Air conditioning, in addition to cooling the air, the humidity, oxygen level and many other things are taken into account. Air conditioners don't just cool the air, they suck out the moisture present in the air. This is what we see in the form of water droplets dripping out of the air conditioning machines. This reduces the humidity of air and makes the air cool and dry.

Clocks are used all over the world and whereever you go the clock's rotate in clockwise direction. This standard for the rotation of clock hands is regularly used to refer to the direction of rotation - "Clockwise and Anticlockwise". The explanation below also tells you why we celebrate New year at Midnight.

The early watchmakers hailed from Northern Hemisphere where shadows on sundials moved West to East as the day progressed. The direction of the shadow of the sun dial is the reason for the direction of the clock.

Ever wondered how a cellular phone which is an electronic device vibrates? I had this question in my mind for days. There is a small mechanical arrangement inside your phone which makes your phone to vibrate. Lets see how this works.

Have you ever wondered why insects even bigger than the spider get stuck in the web but the spider doesn't. Spiders spin sticky webs to help them catch bugs for their meal. But, if a bug gets caught in its web why doesn't the spider get stuck in it?

How does a CHAMELEON change its colour??

Chameleons are distinctive and highly specialized class of lizards. It may be eerie to some to look at them, but their features are very distinctive. They have stereoscopic eyes which means they have a binocular vision making them capable of spotting a small insect from a distance of 5-10 m. They can move their eyes independently which allows them to focus on two objects at the same time and thus have a 360 degree arc of vision around their body.

Dim lights are ROMANTIC - Why??

Romantic Restaurants are always dimly lit. It makes us feel free to express our feelings. Science has its reasons everywhere and even here, there is a reason about how the dim lights makes you romantic.

There is a thick relationship between EYES and HUMAN BEHAVIOUR. Our behaviour, intention and mood can be easily judged by the size of the pupil of our eyes.

SHIVERING keeps your body WARM - How??

Temperature is a very important feature. Whether it's our BODY or an Engine, too high temperature and too low temperature results in disorder. Have you ever bothered about controlling your body temperature? You might have done to an extent but the fact is that is our body is pre-loaded with automatic temperature control feature.

Why do ATHLETES always run around in COUNTER CLOCKWISE direction??

Have you noticed this? Athletes always run around the track in Counter-Clockwise direction. This is being followed for years and is not just tradition, it has a very big and important scientific reason behind this.

Our heart is on the left for Humans and animals.

How does an AEROPLANE gets LIFTED??

The magic behind the lifting of an Air-plane is simple. Its impossible for an Aeroplane to lift in the absence of AIR. Any object needs something to get upon. Aeroplane gets upon the huge mass of air. Space crafts are different, they are pushed up and not lifted.

How are Tigers Counted??

Counting the number of persons in a country can be done easily but counting the number of TIGERS is not an easy job. The truth is, finding out the exact number of tigers in a region is not possible. Whenever you see the number of tigers in journals and newspapers they are always accompanied by the word ESTIMATED. Yes, the numbers are estimated one's. Even estimating them is a difficult task and complex mathematical calculations are sometimes used.

Safest place during Lightening..

We know its not safe to stand under trees during lightening storms. What about the safest place?? A Car is the most safest place

The most dangerous place is outdoors. It is better to stay in. But, if you get caught in a lightening storm while playing or walking outdoors you have to be careful. According to physics, Lightening must strike the tallest object, but several times lightening strikes near the tallest post but not the the tallest object.

You should have felt the pain of being Lied to. When this happens in a Relationship, its really unbearable. When you realise the truth by your loved ones, the cheating and lies keeps haunting us. What if you figure out early that someone is Lying to you?? Won't it be better to know the Truth early? Yes, it will be. This Skill of Detecting LIES will help you everywhere in Judging a Person and help you to decide, upon whom to put Faith on.

Here are some Gestures which has been observed to accompany when a Person Lies.

Flame never travels back to Cylinder in a Gas Stove - Why??

Have you ignited your gas stove? Sure you would have or at least you should have seen someone doing so. Has this question sparkled in your mind ever. Why does the Flame on the burner never travels back to the cylinder?? It looks like there is a Flame at the Tail of a tanker. But the Arrangement is completely safe.

Lets see what our Engineers have done inside to keep the Cylinder safe from exploding.

Pages

How does a ZIPPER works??

Why February month has the least number of days?

Why TANKER TRUCKS are made cylindrical and not cubical?

Why do Soft Drink Bottles have 5 bumps at the bottom??

Where does the water dripping out of your Air Conditioner come from?

How to LIE without getting CAUGHT??

Who showed way to Messenger PIGEONS???

Need of Air Conditioning for Electronics

Why do CLOCKS rotate Clockwise??

What makes your Phone to VIBRATE?

A Spider doesn't gets stuck on its own WEB - Why?