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Unit summary

Revise!

1. Four balls – of iron, aluminium, copper and 6. In 2007 the Guinness Book of Records listed
brass – have equal dimensions. Which one is the the largest block of cheese in the world. It had
heaviest? And the lightest? Why do you think so? a mass of 721 kg and a density of 1100 kg/m .
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textbooks nis edu kz
What volume of container would be required to
2. A gold coin that was 19.05 mm thick and had a
diameter of 95.25 cm was issued in Canada in transport this cheese?
1986. Calculate the volume of this coin. 7. While doing laboratory work, a student measured
the mass and volume of an object and obtained
3. What is the volume of a 54 kg piece of ice floating
the following data:
on the surface of a river? If it melted, what
would the mass of the water be? What would its
m/g 100 200 300 400 500
volume be?
V/cm 3 0.2 0.4 0.6 0.8 1.0
4. A circus clown easily throws and catches a g/cm 3
‘weight’ labelled ‘1 tonne’. What is the real mass
of this ‘weight’ if it is made of cork and its volume a) Calculate the density of the object.
is 5000 cm ?
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b) Plot a mass of object vs. volume graph:
5. A 15 cm-long piece of cheese has a thickness of m = f (V).
2/3 of its length and a width of 1/3 of its length.
What is the mass of the cheese if its density is
1100 kg/m ? A mouse stole the piece of cheese
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and ate half of it. How much cheese is left?

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