Why are fighter jets painted grey ??

  Fighter jes are painted grey because of several reasons.

1.  Visual camouflage

                     Fighter jets are painted grey because the colour closely matches with sky and clouds at different altitudes.

                      This camouflage helps jets  blend into the  background making it tough for enemies to spot them with naked eye.

2.  Reducing radar signature 

                   Modern grey paint on jets often contains materials that absorb rador waves. 

                  This rador absorbent paint reduces the chace of getting detected by enemy radars

4. Heat and light management 

                Using grey colour paint reduves the risk of  overheating during long drives.

5. Stealth technology 

                 These fights absorb signals from other rador and infrared materials.     

Why we must not go near a moving train ??

 The main reason is the SUCTION EFFECT !!!

Suction effect created by high speed air movement can pull us towards or even under the train  !!!

Suction effect is also known as Bernoulli's principle.

When a train moves at high speed, it drags layer of air with it. 

According to Bernoulli's principle,  fast moving air between us and train has lower pressure than the still air surrounding us.

This pressure difference creates a net force that can push us towards the moving train   !!!

It can lead to a fatal collision or pulling us into the gap between train and platform.

Watching a fast moving object at close range can cause vertigo.  We may lose our balance and lean or Falk toward the track.

Columbian colonisation

  I am talking about 2 islands situated in Caribbean sea.

These islands are politically part of Columbia,  these islands have distinct history and culture , that often leads to tensions with " colonists Columbia  ".

Here are the reasons  ---

1.  The native population are of African and British Protestant descent.

2.  But Republic of Columbia implemented policies to columbianise the islands.

3.  They started promoting Spanish, Roman Catholicism and mainland migration to solidify its claim against Nicaragua.

4.  People feel close to Nicaragua as they are just 150 km away but far from Columbia which is 750 km away  !!!!1

Islands SAN ANDRES and  PROVIDENTIA view these as " COLUMBIAN COLONIZATION  ".

Why do we snore ??

 Snoring happens  when air can't move smoothly through nose and throat when sleeping.

Airflow vibrates the soft tissues back there and that is the sound we hear when some one is snoring !!!

I will explain what happens   ----

1.  When we fall asleep, muscles in throat and tongue relax.

2.  But if this space gets too narrow, air has to squeeze through faster.

3. Faster air  =  more turbulence = more vibration 

4.  Several things make this space narrow 

         1.  Nasal congestion from cold and allergies 

        2.  Extra tissues from weight gain and large tonsils 

        3.  Tongue falling back because of sleeping on back.

Lying down on back makes the snoring to get louder !!!

Bheja Fry question

  Question 

All mobile numbers in India are 10 digits.

With 10 digit number, how many mobile subscribers can be supported at any time ??

Answer 

In a 10 digit number, each position can be filled by any of 10 digits ( 0 through 9  )

To find the total number, we multiply the number of possibilities for each position.

==>>   10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10

==>>   10  ^  10

==>>    10 billion    !!!

The mathematical answer is 10 billion.

But in India, we have prefix restrictions.

Mobile numbers must start with digits  9   8    7  or  6.

To find the total combination,

For the first digit, we have only 4 possibilities. They are 6  7  8  or  9.

For second digit to last digit, 10 possibilities each ( from  0  to   9  )

==>>    4  *   10  ^   9

==>>   4  billion  !!!