A stone is weighed with a spring balance and its weight in air is found to be

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Problem

A stone is weighed with a spring balance and its weight in air is found to be 2.45 N2.45\,\text{N}. Taking g=9.8 m/s2g=9.8\,\text{m/s}^2, the stone is then fully immersed in a measuring cylinder; the water level rises from 30 mL30\,\text{mL} to 53 mL53\,\text{mL}. What is the density of the stone (nearest 100 kg/m3100\,\text{kg/m}^3)? (a) 9800 kg/m39800\,\text{kg/m}^3 (b) 12500 kg/m312500\,\text{kg/m}^3 (c) 10900 kg/m310900\,\text{kg/m}^3 (d) 8600 kg/m38600\,\text{kg/m}^3

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