At the ends of the rod, suspended in the middle, the steel and copper balls are balanced

At the ends of the rod, suspended in the middle, the steel and copper balls are balanced.
a) The volume of which ball is greater
b) Will the balance of the rod be disturbed, the role of the container will be immersed in water? Why?
c) Which ball will outweigh?
d) In the direction of which ball should the suspension point be moved to restore the balance of the rod?

a) The density of copper is greater than the density of steel, therefore the volume of the steel ball is greater.
b) It will be violated, because a larger buoyancy force will act on the steel ball than on the copper one.
c) Will outweigh the copper ball,
d) To restore balance, it is necessary to increase the shoulder of the ball whose weight in the liquid is less, which means that the suspension point must be moved towards the copper ball.

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