A block has a volume of 0.09 m cubed and a density of 4,000 kg/m cubed. What's the force of gravity acting on the block of water

I have no idea what substance it is that comprises that block.

But whatever it is, you've told me that every cubic meter of it

has 4,000 kg of mass. And I have no reason to doubt you.

So if I were to chip off a little 0.09-m³ piece of that block,

I know its mass would be 0.09 of 4,000 kg. That's 360 kg.

The weight of any mass is (mass) x (gravity), and if we're doing

all of this on Earth, then gravity = 9.8 m/s². So the weight of my

chip off the old block is

= (mass) x (gravity)

= (360 kg) x (9.8 m/s²) = 3,528 Newtons. (about 794 pounds)