Why joints crack and pop ??

 Joint cracking is usually harmless and linked to everyday body mechanics.

In most cases , noise comes from the gas bubbles in joint fluid or the movement of tendons and ligaments over bones.

Release of gas bubbles trapped within joint fluid is the main reason for noise.  There will be the formation of gas filled cavities within the joint fluid.

This fluid naturally contains gases such as oxygen, nitrogen and carbon dioxide. When the joint is stretched, bend or twisted, the pressure inside joint capsule changes.

This causes the gas bubbles to burst.  This sudden change in pressure produces pop sound.

A ligament or tendon occasionally slip out of its normal position and then snap back to place creating a pop sound.

This is usually harmless.

Amazing facts about mid ocean ridge ??

 World's longest mountain range is completely underwater and called MID OCEAN RIDGE.

It stretches for more than 65,000 kms  !!!

It covers around 23% of  Earth's surface.

Iceland is the only place where ridge has come above sea level.

It has caused one of strongest underwater earthquakes.

Why do ships move slowly ??

 I had read the report that ship carrying LPG has crossed Hormuz strait few days ago.

Today it has reached India  !!!

We are in a gas emergency condition and why the ships carrying LPG are coming so slowly  ??!!

Ships move slowly because of the extreme physical resistance of water and the massive cost of trying to overcome it.

Moving through water is extremely difficult compared to moving through air.

Water is 800 times more denser than air !!! This creates immense hydrodynamic drag that pushes against ship's hull.,

The power required to move a ship increases at cubic rate relatively to its speed. This means if we want to double the speed of the ship, we need 8 times more engine power  !!!!

As ship moves, it must physically push water out of it's way.  To go faster, ship requires colossal amount of energy.

That's why for most commercial shipping, speed is sacrificed for carrying capacity and fuel efficiency.

Because of their vast size, stopping and turning takes long time and higher speeds make this much more dangerous,.......

What is the smallest desert of the world ??

 The  Carcross desert located near Carcross in Yukon, Canada  is the world's smallest desert.

It is technically a series of sand dunes, spanning about 1 square Mile.

Technically, some scientists say it is not a " true  " desert because the rainfall is very high.

Its  a sub Arctic environment receiving significant precipitation making it much wetter than typical hot deserts.

It is actually a sandy bottom of a drained glacier lake from last ice age  !!!

How many paise for 1 rupee??

 We know that 100 paise for 1 rupee. 

But I am talking about in the year 1954 , how many paise for 1 rupee   ?? 

1.  50  paise

2.  32 paise

3.  64 paise

4.  48 paise

When this question was asked on koun banega karodpati program, I was just clueless   !!!! 

Nowadays, inflation is much more higher that we have demonetised the paisa from year 2011.

In 1957, India adopted decimal system for its currency.  Before to that, one rupee was divided into 16 annas.

==>>   16   annas   =     64   paise

==>>  1  anna   =     4   paise

Before to 1957 ,  1 rupee  ==  64  paise

Answer             64   paise    !!!!