On Gravity – Is the Earth hollow?
George Gamov has written a number of books explaining science to the lay men
In one book, I learned that a pendulam , when brought near a hill , gets slightly deflected towards the hill ; so much so that , by measuring the angle of deflection ,we can calculate the mass of the hill .This set me thinking about gravity .
Now , consider a body free to move within the Earth like a nutrino.
As soon as the body enters the Earth, it becomes subject to the circular spin of the Earth which pushes the body away from the centre of the Earth. This centrifugal force is greatest at the equator and zero at the Poles. So the net gravitational force will be g (-) cf
COOLING
Now , the cooling process of a hot heavenly body (once , the earth was a hot ball of gas ) is always unequal .The outer layers cool off very quickly , while the interior still remains hot because heat cannot escape directly to the outside , like a crowd of people where those inside the crowd will find it difficult to escape .At one stage, the outer layer may become liquid and the inside still gas .Again ,the ouside becomes solid ,followed by a layer of liquid , with the interior still in gaseous stage .
A body moves always towards the region where there is mass more thickly packed , that is , where density is more .So , when the outer layer of the earth is solidified ,and will not shrink further , liquifaction of the gas inside (A VERY SLOW PROESS ) results in a hollow space being formed in the centre .This hollow goes on increasing as the cooling continues .Experts can calculate the volume of hollow inside the earth.
Recently , I read in the news paper that geologists were surprised to learn that a comet was seventyfive percernt hollow inside ,following Deep Impact experiment by NASA scientists .I was not !
In a test tube containing water and oil ,water will occupy the bottom .In other words , the arrow of g will point towards denser matter .Therefore , in the center of the earth , this arrow showing the direction of -rg (REVERSE GRAVITY )-will point towards the crust of the earth .Where g and rg will meet is the point of maximum gravity .Gold etc are located here (In the liqud state , they were free to move ) At the equater ,value of g -cf will be minimum , rg +cf maximum , centrifugal force opposing gravitatioonal pull and reverse gravity aided by this force .A slight pull by the gravitational force of the sun or moon or both wil affect this tug of war , causing the slender crust of the earth to bulge , resulting in ocean tides .
George Gamov has written a number of books explaining science to the lay men
In one book, I learned that a pendulam , when brought near a hill , gets slightly deflected towards the hill ; so much so that , by measuring the angle of deflection ,we can calculate the mass of the hill .This set me thinking about gravity .
Now , consider a body free to move within the Earth like a nutrino.
As soon as the body enters the Earth, it becomes subject to the circular spin of the Earth which pushes the body away from the centre of the Earth. This centrifugal force is greatest at the equator and zero at the Poles. So the net gravitational force will be g (-) cf
COOLING
Now , the cooling process of a hot heavenly body (once , the earth was a hot ball of gas ) is always unequal .The outer layers cool off very quickly , while the interior still remains hot because heat cannot escape directly to the outside , like a crowd of people where those inside the crowd will find it difficult to escape .At one stage, the outer layer may become liquid and the inside still gas .Again ,the ouside becomes solid ,followed by a layer of liquid , with the interior still in gaseous stage .
A body moves always towards the region where there is mass more thickly packed , that is , where density is more .So , when the outer layer of the earth is solidified ,and will not shrink further , liquifaction of the gas inside (A VERY SLOW PROESS ) results in a hollow space being formed in the centre .This hollow goes on increasing as the cooling continues .Experts can calculate the volume of hollow inside the earth.
Recently , I read in the news paper that geologists were surprised to learn that a comet was seventyfive percernt hollow inside ,following Deep Impact experiment by NASA scientists .I was not !
In a test tube containing water and oil ,water will occupy the bottom .In other words , the arrow of g will point towards denser matter .Therefore , in the center of the earth , this arrow showing the direction of -rg (REVERSE GRAVITY )-will point towards the crust of the earth .Where g and rg will meet is the point of maximum gravity .Gold etc are located here (In the liqud state , they were free to move ) At the equater ,value of g -cf will be minimum , rg +cf maximum , centrifugal force opposing gravitatioonal pull and reverse gravity aided by this force .A slight pull by the gravitational force of the sun or moon or both wil affect this tug of war , causing the slender crust of the earth to bulge , resulting in ocean tides .
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