In what direction does the buoyant force on an object immersed in a liquid act?

Amit buys a few grams of gold at the poles as per the instruction of one of his friends. He hands over the same when he meets him at the equator. Will the friend agree with the weight of gold bought? If not,why? [Hint: The value of $g$ is greater at the poles than at the equator.]

You find your mass to be $42\, kg$ on a weighing machine. Is your mass more or less than $42\, kg$?

If the moon attracts the earth,why does the earth not move towards the moon?

The volume of a $500\, g$ sealed packet is $350\, cm^3$. Will the packet float or sink in water if the density of water is $1\, g\, cm^{-3}$? What will be the mass of the water displaced by this packet?

What happens to the force between two objects,if
$(i)$ the mass of one object is doubled?
$(ii)$ the distance between the objects is doubled and tripled?
$(iii)$ the masses of both objects are doubled?