this is about gravity?

Question

hi
as we know gravity and its effects ..
i really wanna know what creats gravity..
on earth we can say its is the sheer attraction of two objects in space..

and one of the reasons why gravity exists is due to the heat source of the sun and the core of the earth and other planets,,

but a black hole has no mass at all its smaller than a speck of sand so far we understand.........
then how come is this small black hole has immense gravity....
so much of gravity enough to destroy the whole milky way galaxy in the coming 50 million years......!!

oh and i am not bothered or worried of the planet as my very existence is not possible by that time ...

but this question might answer me from you what to do and what to understand to live a better life ...so please answer the right way...
because this is surely not an other stupid question !!!!!!

Answer 1

Gravitational force is a form of energy that is exerted by all objects in the universe including us. As the force exerted by us is very less, we could not detect them. Scientists have found that when two black holes merge together, an enormous amount of energy is liberated. Maximum amount of energy is liberated in the form of gravitational waves. These gravitational waves propogate upto 30000 light years.

Answer 2

There is no way to explain gravity in the quantum level because no particles of gravity have been discovered. Also string theory is not defenite. So in reality the mutual attraction of bodies of masses is the closest we are to what gravity is. According to Einstein however, gravitaion in nothing but a curve in the space time continium. It is like ur creating a small whirlpool and so planets or other bodies keep on rotating. This curve is caused by an object with an immense mass like the planets and more so stars. This also explains why only stars form black holes.

Answer 3

Your statement that a black hole has no mass is incorrect. A black hole has incredible amounts of mass compacted into a relatively small space.

Here is a good explanation of how black holes are formed, including how their gravity comes to be:

"General relativity (as well as most other metric theories of gravity) not only says that black holes can exist, but in fact predicts that they will be formed in nature whenever a sufficient amount of mass gets packed in a given region of space, through a process called gravitational collapse; as the mass inside the given region of space increases, its gravity becomes stronger and (in the language of relativity) increasingly deforms the space around it, ultimately until nothing (not even light) can escape the gravity; at this point an event horizon is formed, and matter and energy must inevitably collapse to a density beyond the limits of known physics. For example, if you compressed the Sun to a radius of three kilometers (about four millionths of its present size), the resulting high density would create an event horizon around it, and thus a black hole."

Answer 4

Hi. You have made a few assumptions that are probably not correct. There is quite a bit of mass in a very small space in a black hole. Gravity is caused by mass and its effect on the surrounding space, not heat. And our galaxy probably does have a black hole (I hate that term) at it's center but should last for much longer than 50 million years.

How you live your life is a personal choice, and I would not presume to guide you.

Answer 5

According to current theory gravity is transmitted by gravitons, which are certain 'frequencies' of string theory and are likely zero mass themselves and are ubiquitous. String theory demonstrates that these 'force' elements are made of the 'final' order of material, an energy that cannot be further divided and that even larger particles such as quarks are made of the same 'things' but at different frequencies which in turn have some mass. Of course, then various quarks make up electrons, protons and neutrons which then make up atoms and so on. Broader Newtonian notions of gravity have long sense been proved incorrect although gravity's affects can still be demonstrated using them. Read The Elegant Universe by Brian Greene or similar modern books for additional enlightenment.

Answer 6

Nobody probably knows the exact source of gravity. Number of theories may be developed on the basis of ur observations.

Answer 7

it's all in your mind, that's why some people can levitate