Recent content by Altair Tans

Ok so there is a field, there is energy associated with it, but these quantities don't get a chance to be in use. Is my understanding correct sir?

I am speaking in the sense that like if there's just one object in an empty universe its motion is not defined. Its moving or at rest is not defined as long as there's no frame to refer with. Similarly i believe without something to act upon the concept of force , field of force and energy...

What are fields there for then?

Thank you. I understand now

But the work done by that external agent would cause increase in kinetic energy.it is not doing any work against force of gravity(as they are perpendicular). So if its not doing work against gravity how is its work converted to gravitational PE?

Suppose a body is held stationary at a height h above earth, having some PE Now if the same body is in orbit around Earth at same height, owing to its velocity its mass increases causing the PE at that height to be more than what it was when the body was stationary. Where did the extra energy...

I think you are getting confused here, You know time slows down for the moving guy So if speed = distance / time And if time taken for the same distance has increased because time runs slow then speed should decrease and along with it effect of time dilation should decrease But think about in...

What if there is a universe with just one point charge in existence....just a charge with vast emptiness around it....now here all laws of physics remain same... But is the concept of field and energy defined there??

Are the electrons of a conductor so loosely bound that just moving a current might give rise to a tiny bit of current owing to electron's inertia??

Frictional force is internal...but there is always heat loss associated with it...you can't ignore thatMomentum change of the system due to friction will be zero owing to its internal nature but heat loss would have to be considered

Knowing exact motions of the air particles would be a godlike achievement... . So instead we talk in the language of pressures... More density of particles = More pressureBehind the door (in the room) there is high density while in front of door (outside the room) while walking you took away...

Every sand particle doesn't start moving as soon as it falls...but over a short interval it has to overcome friction and attain the velocity...out of 73.5 watt 36.75 goes into kinetic energy and remaining half goes into work against friction

You walk past and drag some of the air with you out of the room.....hence pressure on the inside of the room is more than that near the door.....air particles on the inside side of the door outnumber the ones on the outside side which causes a net force out of the room which pushes the door out...

Say in a segment (current flowing from left to right) at a time to its left current is high and to its right its less... So to conserve charge, some charge stays at the junction.... Now due to this piled up charge electric field will now push the charges on its left opposing their flow and push...