Use of helium in spacecraft and rockets

 Rockets need to achieve specific speeds and altitudes to reach and maintain orbit.

A heavier rocket requires more energy. It becomes expensive to develop, test and maintain.

Helium has very low boiling point. It allows it to remain at gaseous state even in super cold temperatures because rocket fuels will be at that temperature.

Helium is used to pressurise fuel tanks, ensuring fuel flow to rocket engine without any interruption.

It maintains the overall pressure inside. As it is non reactive, it can safely mingle with tank's residual contents.

Helium is also used as lifting gas in balloons and airships. 

Inhaling a small value of helium gas, temporarily changes the timbre and quality of human voice.

Which is the country ??

  This question was asked on Koun Banega Karodpati program.

Question 

Siliguri corridor does not share border with which country ??

1.  Nepal

2.  Bhutan 

3.  Myanmar 

4.  Bangladesh 

Answer 

Siliguri corridor is known as " Chicken's neck ". It is a narrow stretch of land in West Bengal that connects mainland India to its eight northeastern states.

Siliguri corridor does not share border with Myanmar, China.

Though China is very close to corridor because of Tibet, it does not physically touch Chinese border.

But China is not in the option !!!

So, according to options,  MYANMAR is correct answer.....

What makes the pop sound when we clap ???

While most of the people think that sound of a clap comes from hands hitting each other,

It is more than that. !!! 

The noise comes from a cavity of air that is compressed and pushed out of a small space.

Compressed air behaves like a resonator.

This is the same principle behind blowing across a battle's Mouth.

Palms create a cavity and the gap near the thumb acts like a neck. 

The air escapes through the opening between thumb and index finger.  This air jet vibrates and creates sound waves.

Faster air compresses the air more thus creating stronger air jets and louder pops.  

ದುಂಡಿ ರಾಜರ ತುಂಟ ಹನಿ ಕವಿತೆ

 ಇದು ನಿನ್ನೆ ಉದಯವಾಣಿ ಪೇಪರ್ ನಲ್ಲಿ ಪ್ರಕಟವಾದ ದುಂಡಿ ರಾಜರ ಹನಿ ಕವಿತೆ.

ನನ್ನಿಂದ ಕೊಂಚ ಬದಲಾಯಿಸಲ್ಪಟ್ಟಿದೆ  !!!

ರಸ್ತೆ ಬದಿಯಲ್ಲಿ ಬೆಳೆಯುವ ಹುಲ್ಲಿಗೆ 

ಗೊಬ್ಬರ -  ನೀರು ಹಾಕುವವರು ಯಾರು  ??

ಅದಕ್ಕೇ ಸಾಕಿದ ನಾಯಿಯನ್ನು 

ದಿನವೂ ವಾಕಿಂಗ್ ಗೆ  ಕರೆದೋಯ್ಯುವರು   !!!!

Tallest residential buildings in the world

  These buildings are not just homes, they are symbol of wealth, design innovation and space optimization in crowded, metropolitan areas.

Here are such residential buildings   -----

1.  Central park tower, New York city, 98 floors 

2. 111 West 57th street, New York City,  84 floors 

3.   432 Park Avenue, Midtown Manhattan ,  85 floors 

4.  Marina 101, Dubai, 101 floors 

5.  Princess Towers, Dubai, 101 floors 

6.  23  Marina,  Dubai , 89 floors 

7.  Burj Mohammed Bin Rashid, Abu Dhabi ,  88 floors 

8.  Elita Residence ,  Dubai 

9.  Primo Tower, Dubai ,  79 floors 

10.  Sky Tower Pinnacle one yonge, Toronto, 106 floors