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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 av

Hydrogen is the chemical element with the symbol H and atomic number 1. It is the lightest and most abundant element in the universe, constituting about 75% of its elemental mass. In its most common form, hydrogen exists as a diatomic molecule (H2), which is a colorless, odorless, and tasteless gas . Hydrogen is highly reactive and can form compounds with almost all other elements. It is used in a wide range of industrial applications, such as in the production of ammonia for fertilizers, in petroleum refining, and in the manufacture of various chemicals. It is also used as a fuel for vehicles, either in its pure form or as a component of other fuels like natural gas. Hydrogen has attracted attention in recent years as a potential clean energy source. When hydrogen is burned or reacted with oxygen in a fuel cell, it produces only water and releases a significant amount of energy. However, the production of hydrogen itself often involves the use of fossil fuels, so it is not

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

                                                      Dakhineshwari Metro station

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.

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