Question

what is the mass of a object at the centre of earth.

Answer 1

mass has nothing to do with the location of the object,it is just the matter content in the body,strictly speaking the sum total of the atomic and molecular masses of it,s constituting atoms and molecules.which is same everywhere irrespective of it,s location

Answer 2

hiii.....

What is the gravity at the centre of Earth, zero or infinite? Just getting to the center of the Earth and surviving is impossible. The Earth's core is about 9,000°F—as hot as the sun's surface—and would instantly roast anyone who found himself there.

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