your friend alok bought some gold it as a gift to her sister living in Australia when her sister weighted it she found some variation in the weight of gold. elabodare the reason for her observation
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The gravity varies from place to place
The place where gravitational pull is more the weight is more
The place where gravitational pull is less the weight is less
Shape of the earth - the earth is an oblate spheroid, meaning it doesn't have uniform radius all through it's surface. This makes some places closer to the centre of the earth ( e.g the poles), while some other places are far away from the earth centre (the equator).
This is why an object somewhere close to the equator will be lighter than the same object placed somewhere closer to the pole.
Hope it helps.. <3
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