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A square brass plate is 2 mm thick and has a mass of 1.05 kg. The density of the brass is 8.4 g/cm3. Calculate the length of the plate in centimeters

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Volume = mass/density 
1050cm3/8.4 = 125 cm3
∴ L x L x 0.2 cm = 125 cm3

L2 = (125 cm)/0.2 = 625
L = √(625 ) = 25 cm

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