Physics problems in grade two The total mass of an empty bottle filled with water is 700g. If 108G metal block is put into the empty bottle, the total mass is 768g 1. Volume of metal block 2. The density of this metal block You can't do it with buoyancy. I haven't learned it

Let the volume and density of the metal be V1 and ρ 1, and the density of water be P2
then:
V1 * ρ 1 = 108 (mass formula of metal)
V1 * P2 = 700 + 108-768 (this is the mass of water discharged from the same body after putting the metal in)
So you can get V1 from formula 2, and then you can get rid of the metal density through formula 1!
I won't tell you the answer, children's study should refuel!

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