Helium

-

Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, and inert gas that heads the noble gas group in the periodic table.

Its boiling and melting points are the lowest among all the elements and it exists only as a gas except in extreme conditions.

Helium was first discovered in 1868 by French astronomer Jules Janssen and British astronomer Joseph Norman Lockyer during a solar eclipse. The element is named after the Greek god of the sun, Helios.

Helium is the second lightest element and is almost seven times lighter than air. It is widely used in cryogenics, as it has the lowest boiling point of any element, and is used to cool materials and instruments to extremely low temperatures. Helium is also used in the production of semiconductors, fiber optics, welding, and as a lifting gas for balloons and airships.

The supply of helium is limited, and its price has increased in recent years due to concerns over its availability.

Most of the world's helium is extracted from natural gas deposits, and as these reserves are depleted, there are increasing efforts to find alternative sources of the ga

Comments

Post a Comment

Popular posts from this blog

Irrotational Vector field

-
Image
A vector field  vector F is said to be irrotational vector if curl of F is equal to zero ▽ x F  =0 Irrotational Vector field Concept The Above phenomenon is due to Irrotational vector Field.   Explanation Of above picture:  Side wheels indicated as red arrow and white arrow are rotating in the direction of Anti-Clockwise and Clockwise respectively Red arrow- (Wheel)->Anticlockwise White arrow-(wheel)-> Clockwise Why Middle wheel does not rotate? Answer: Middle wheel does not rotates because the flow of water to the surface of wheel does not allow to move. Why does side wheels rotate? Answer: Because at the side of river the speed of flow of water is very low as compared to in the center of the river. Disclaimer: If you want to give feedback or Your point of view on this discussion please write us in the comment below.
Read more

Don't miss in 2023 about Technological Facts

-
Image
Touch Screen Working Do You Know, Your Bare finger,when you touch your phone's screen an Electrical circuit is complteted at the point where finger makes contact. Changing the electrical charge at this location You device registers this information as a "touch event". Eye Blink Sensor IR Emitter emits an IR light towards the eye. IR Photodiode is designed to detect IR-Infraradiation How Does Google Assistant work technically Assistant uses visual Signals to Detect. Then "Wakes Up" to listen to their Utterance. Further Validate and Understand the user's Intent Using Visuals and Acoustic Signals The Wake Word is Based on Neural Network Algorithm NPCI-National Payment Corporation Of India National Payment Corporation of India International is Established By RBI-Reserve Bank Of India. Under the provisions of Payment and Settlement System Act 2007. For creating a robust Payment and settlement Infrastructure
Read more

THE EXPANDING UNIVERSE

-
Image
Our sun and the nearby stars are all parts of a vast collection of stars called the MILKEY WAY GALAXY. For a long time it was thought that this was the whole UNIVERSE . In 1924 that the American Astronomer Edwin Hubble demonstrated that ours was not the only galaxy. There were, in fact many others,with vast tracks of empty space between. In order to prove this he need to determine the distance between to thses other galaxies. 1.DETERMINATION OF STARS : We can determine the distance of nearby stars by observing how they change position as the Earth goes around the sun. But other galaxies are so far away that, unlike nearby stars, they really do appear fixed. Hubble was forced,therefore, to use indirect methods to measure the distances. 2.Factors On which the brightness of Stars depends: i.)LUMINOSITY ii.)How FAR IT is For nearby stars we can measures both their apparent brightness and their distances, so we can work out their luminosity. Finally some i
Read more