## Thursday, 14 August 2014

### DENSITY AND FLOATING

DENSITY AND FLOATING

1. What is the formula for density?

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2. There are two statues of exactly the same dog and both are the same size but one is of bronze (density 6000 kg/m3) and the other is of iron (density 7300 kg/m3) (a) which one is the heavier?

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(b) if the volume of the bronze statue is 0.1 m3 how heavy is it?

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3. What is the density of a rock if 0.4 m3 has a mass of 1200 kg?

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4. If a solid object floats in water what does this tell you about its density?

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5. In that case why will an iron ship float in water?

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6. A block of copper is hung from a Newton meter and immersed first in water (density 1000 kg/m3) and then in brine (salty water) (density 1100 kg/m3). In which liquid will the copper appear to weigh least?

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