Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
High-R:
hey ppl wats gravitational ENERGY?
i got this question of the stone being thrown upwards and comes down.....and it asks where is the gravitational energy the least....so the answer is: tht the gravitationalenergy is least when the stone is just about to touch the ground!!!
can anyone explain y?...and how..wats this Gr.Energy?
6394:
--- Quote from: hamz on May 25, 2010, 10:14:58 pm ---hey ppl wats gravitational ENERGY?
i got this question of the stone being thrown upwards and comes down.....and it asks where is the gravitational energy the least....so the answer is: tht the gravitationalenergy is least when the stone is just about to touch the ground!!!
can anyone explain y?...and how..wats this Gr.Energy?
--- End quote ---
lol hamz no 1 noes
acha sun konsa ppr kr rahi hai!!!
Vin:
--- Quote from: ang3l on May 25, 2010, 10:12:25 pm ---How do u calculate the Circumference?
--- End quote ---
One COMPLETE revolution is the circumference ..
Syed Kazim:
--- Quote from: Ivo on May 25, 2010, 09:42:11 pm ---Can anyone please explain electromagnetic induction. Which cuts which?
--- End quote ---
Electromagnetic induction is the process of producing electricity from magnetism. Faraday suggested that a voltage is induced in a conductor whenever it 'cuts' magnetic field lines, i.e. moves across them. Note that a voltage is not induced if the conductor moves along them or is at rest.
The induced voltage increases with the increase of:
* the speed of motion of the magnet or coil,
* the number of turns in the coil,
* the strength of the magnet.
To answer your second question, the conductor 'cuts' the magnetic field lines.
pglasg74:
can someone explain how we can reduce heat transfer by radiation, by convection and conduction please? respectively?
and how do you know which fuse to choose? like for a lamp that operates at .25 A, and the wire can carry 4 A, how do u kno tht the fuse is 1A :S:S:S
and gravitational energy is energy that an object has when its not on the ground (or any origin) so if u throw a stone from the mountain, right at the top is the most gravitational energy, and right at the bottom is the least.. proportional to height
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