Articles [Arts & Science]

Why the friction is nil in rolling friction? Friction is nil in pure rolling motion on a horizontal surface. Suppose friction were acting on a sphere in pure roll on a horizontal surface. If it's direction is such that it increase velocity of mass...

What is time? Actually there are two theories related to born of the universe. First is well known big bang which tells that universe was a sphere at start and after big bang it started expanding and will keep expanding till its end. And another...

NUTRITION IN PLANTS AND ANIMALS All organism need energy to perform various processes of their lives. Energy is necessary for them whether they are working or at rest. We require energy even during sleep because a number of biological activities...

Gravity and anti gravitation Gravitation is nothing but a force commonly known as "gravitational force". A body attracts another body if they are having a potential difference; potential difference is also a form of energy. If both the potential...

Hawking radiation As we know, a particle-antiparticle pair is sometimes created near the event horizon of a black hole. Why is it that the antiparticle falls into the black hole and the particle moves away from it? What is the determining factor...

Collision What happen when two electron collide with each other with the velocity of light? Electrons will not travel with the velocity of light. Only light travels at that speed but it not required dat electrons travelling with velocity =c....

Light Velocity There is a postulate that says that all bodies are travelling through the dimensions of Space and Time at light speed. Hence light speed is a limit, and your movement in one specifies dimension is getting faster, the speed on other...

Gravity Einstein is a man of imagination. He always wants to imagine the universe as he thinks. His universe is completely different and he was not able to accept other's ideas which will not coincide his own. I would like to discuss more about...

Matter destroyed or converted. We know that matter is anything that has "mass" and occupy space. Now according to E=mc2, mass can be converted to energy and energy can also be converted to mass. If we destroy some mass, doesn’t it conflict with...

What is randomness? I want a good physical understanding of randomness. Is there something really random? Classically when we say the event is random. We usually do so because we don't know the exact information. Are we known that there was a...