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13. The weight of an object is 10 N in the air, 6.3 N in water...

13. The weight of an object is 10 N in the air, 6.3 N in water (water density 1000 Kg/m3). Identify the material according to the following density values:

Al: 2700 Kg/m3 ; Ti: 4500 Kg/m3 ; Zn: 7000 Kg/m3 ; Sn: 7300 Kg/m3 ; Fe: 7870 Kg/m3

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