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General Topics Articles
Page 22 of 35
What are amphibious fishes? Can they live outside water?
The fishes that can survive without water for a good amount of time are known as amphibious fishes. Convergent evolution plays an important role in these species, as the next generation species receives analogous structures that have similar function but were not present in the last generation.Many fishes are amphibious, which means they can naturally survive out of the water. These fishes have developed limbs or use lateral undulation (that is, wave-like movement patterns that act to propel an animal forward) for terrestrial locomotion. They leave water bodies for many reasons like escaping predators, low oxygen environments etc.Ancient fish had ...
Read MoreWhat are the duties of a prime minister in Indian constitution?
The Prime Minister of India is the head of government and pioneer of the executive branch of the Government of India. The Prime Minister is likewise the chief counselor to the President of India and is also the leader of the Council of Ministers.The Prime Minister can be an individual from any of the two places of Parliament (the Lok Sabha or the Rajya Sabha), however, must be the chief of the political party, having a superiority in the Lok Sabha.The Prime Minister is the senior individual from the bureau in the official branch of government in a parliamentary framework. ...
Read MoreWhat is the difference between CDSL and NSDL?
CDSL stands for Central Depository Services India Ltd and NSDL stands for National Securities Depository Ltd. Depository refers to an organization which holds the stocks of investors and shareholders. NSDL and CDSL are the two apex depositories in India. Just like banks take care of cash and deposits, they hold bonds, stocks etc for the shareholders in electronic form.Functioning of CDSL and NSDLWe need not send share certificates physically for transfers like in the old days, the NSDL and CDSL help to convert and hold shares in the Demat form. Since their establishment, we received huge contributions from both these ...
Read MoreExplain the working of a turbojet engine.
A turbojet engine is used in Aircraft. These are air-breathing engines which suck in air from the atmosphere for combustion. It has various components like inlet, compressor, combustion chamber, turbines, and nozzle. Air is drawn into the turbojet engine, compressed, mixed with fuel, and burned continuously.The exhaust product of this burning operates the turbine for the compressor, producing thrust which propels the aircraft. Turboprops are used in smaller and slow-paced air crafts as turbojets are not efficient at low speeds whereas turbofans have better specific fuel consumption than the turbojet. These engines are generally installed below the wings or near ...
Read MoreWhat is the largest earthquake in the world?
An earthquake is defined as the sudden shaking of the Earth's surface. Earthquakes are caused by the collision of tectonic plates in the Earth's crust. These plates ride over each other when instability is created in the crust due to the release of energy from the Earth's core.There are large earthquakes and small earthquakes. Earthquakes are measured using an instrument called Seismometer. The magnitude of an earthquake is represented on the Richter scale. On the scale, 3 or less is scarcely noticeable, and magnitude 7 or more causes damage over a wide area.The Great Chilean earthquake also known as the ...
Read MoreWhat is the difference between scramjet and ramjet engines?
Both scramjet and Ramjet are types of jet engines. A ramjet is an air breathing jet engine which is usually associated with supersonic transport. Ramjets can start at supersonic speeds only, so as a result they cannot be started at zero velocity and cannot produce thrust as there is a lack of airspeed.Hence assisted take off flights or rockets are needed to or accelerate it to a supersonic speed from which it starts producing thrust. This makes ramjet engine to be efficient only at supersonic speeds as it can accelerate to speeds of about Mach 6. Ramjet has revolutionized Rocket ...
Read MoreHow can India create more salaried jobs?
India is a developing country. Got bored of hearing this again and again, right? For it to be a well-developed country, India needs to focus more on developing its economic status. India has less than one-fifth of workers who are in salaried employment.More job creation would boost up India’s rank in Global Prosperity ladder. India is still in lower middle-income status which needs some salaried jobs to boost its status. The economic survey 2017-18 says if the per capita income in India grows at 6.5% per year, India would reach upper-middle-income status by the mid-to-late 2020s.In my view, a few ...
Read MoreWhat is a robonaut? Can it replace astronauts in the future?
Robonaut is a NASA robot, which is designed as a humanoid. The artificial intelligence makes it easier for Robonaut to do the same jobs as a human. Robonaut could help with anything from working on the International Space Station to exploring other worlds. The core idea behind the Robonaut series is to have a humanoid machine work alongside astronauts. Its form factor and dexterity are designed such that Robonaut can use space tools and work in similar environments suited to astronauts.These new space explorers won’t need space suits or oxygen to survive outside of the spacecraft. Thus they might help ...
Read MoreWhy is Visible Learning more effective?
A good teacher teaches the children putting his best efforts, whereas a better teacher evaluates the effects of his teaching on his students and tries to improve his way of teaching. End of the day, improvement in the status of the student and his learning is more important.An improved process called as Visible Learning was made by John Hattie to help the teachers evaluate their teaching process. It says, “Know Thy Impact” by showing what the teachers have taught and what did the students learn, which enables to understand the gap so as to bridge it.Visible Learning is the concept ...
Read MoreWhat is meant by a rocket propellant?
A rocket can be an aircraft, spacecraft or a missile which is propelled by a rocket engine. A rocket engine works on the principle of Newton's Third law, that is, for every action, there is an equivalent and opposite reaction. Rocket propellant is the fuel which burns and produces thrust to propel the rocket.The propellants are usually fueled together with the oxidants. Oxidants are required to burn the fuel efficiently. Thus the chemical reaction in the combustion chamber produces the required energy for thrust.The propellant is burnt in a controlled manner in the combustion chamber of the rocket engine and ...
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