SI units (Le Systeme International d’Unites). SI units (Le Systeme International d’Unites)

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Presentation transcript:

SI units (Le Systeme International d’Unites)

Volume  cubic metre (m3) SI units 1m (Le Systeme International d’Unites) Volume  cubic metre (m3) 1m 1m

Volume  cubic metre (m3) SI units 1m (Le Systeme International d’Unites) Volume  cubic metre (m3) 1m 1 cubic metre = 1m x 1m x 1m 1m

Volume  cubic metre (m3) SI units 1m (Le Systeme International d’Unites) Volume  cubic metre (m3) 1m 1 cubic metre (1m3) = 1000 litres (l) 1 cubic metre = 1m x 1m x 1m 1m

Same as 1 cubic decimetre (dm3) 1 litre bottle = 1l Same as 1 cubic decimetre (dm3)

Same as 1 cubic decimetre (dm3) 1 litre bottle = 1l Same as 1 cubic decimetre (dm3) 1 litre = 1000 cubic centimetres (cm3) = 1000 millilitres (ml)

Same as 1 cubic decimetre (dm3) 1 litre bottle = 1l Same as 1 cubic decimetre (dm3) 1 litre = 1000 cubic centimetres (cm3) = 1000 millilitres (ml) 1 cm 1 cm 1 cm 1 cubic centimetre (cm3) = 1 millilitre (ml)

Same as 1 cubic decimetre (dm3) 1 litre bottle = 1l Same as 1 cubic decimetre (dm3) 1 litre = 1000 cubic centimetres (cm3) = 1000 millilitres (ml) 1 cm 1 cm Aluminium Lead 1 cm For any given volume (eg. 1cm3) lead is heavier than aluminium. It has a higher DENSITY 1 cubic centimetre (cm3) = 1 millilitre (ml)

DENSITY = Mass Volume

1000 cm3 of water (1 litre) therefore has a mass of 1000g (1 kilogram) DENSITY = Mass Volume Water has a density of 1 g/cm3 1000 cm3 of water (1 litre) therefore has a mass of 1000g (1 kilogram)

1000 cm3 of water (1 litre) therefore has a mass of 1000g (1 kilogram) DENSITY = Mass Volume Substance Density (g/cm3) Wood 0.75 Ice 0.92 Water 1.00 Aluminium 2.70 Copper 8.90 Lead 11.4 Water has a density of 1 g/cm3 1000 cm3 of water (1 litre) therefore has a mass of 1000g (1 kilogram)

DENSITY = Mass Volume Water has a density of 1 g/cm3 THINK! A solid object with a density lower than that of water will float. So why should a battleship made of aluminium not sink? DENSITY = Mass Volume Substance Density (g/cm3) Wood 0.75 Ice 0.92 Water 1.00 Aluminium 2.70 Copper 8.90 Lead 11.4 Water has a density of 1 g/cm3 1000 cm3 of water (1 litre) therefore has a mass of 1000g (1 kilogram)

Calculating density In the density equation, density is shown by the Greek letter ‘rho’ = DENSITY = Mass Volume = m V

Calculating density In the density equation, density is shown by the Greek letter ‘rho’ = DENSITY = Mass Volume = m V m V V = m m = V x

m V Calculating density Eg. What is the density of a block of steel if it has a mass of 9,360g and a volume of 1,200cm3? m V

m V Calculating density Eg. What is the density of a block of steel if it has a mass of 9,360g and a volume of 1,200cm3? m V = 9 360 1 200 = 7.8 g/cm3

m V m = 540 x 19.3 = 10,422g Calculating density Eg. What is the density of a block of steel if it has a mass of 9,360g and a volume of 1,200cm3? m V = 9 360 1 200 = 7.8 g/cm3 Eg. What is the mass of a block of gold if it has a density of 19.3 g/cm3 and a volume of 540 cm3? m = 540 x 19.3 = 10,422g

m V m = 540 x 19.3 = 10,422g Calculating density Eg. What is the density of a block of steel if it has a mass of 9,360g and a volume of 1,200cm3? m V = 9 360 1 200 = 7.8 g/cm3 Eg. What is the mass of a block of gold if it has a density of 19.3 g/cm3 and a volume of 540 cm3? Eg. What is the volume of a block of ice if it has a density of 0.92 g/cm3 and a mass of 12,462g? m = 540 x 19.3 = 10,422g

Calculating density Eg. What is the density of a block of steel if it has a mass of 9,360g and a volume of 1,200cm3? m V = 9 360 1 200 = 7.8 g/cm3 Eg. What is the mass of a block of gold if it has a density of 19.3 g/cm3 and a volume of 540 cm3? Eg. What is the volume of a block of ice if it has a density of 0.92 g/cm3 and a mass of 12,462g? m = 540 x 19.3 = 10,422g V = 12 462 = 13,546cm3 0.92

Volume and Density Measuring cylinder Volume of a liquid Measuring cylinder Read off the level on the scale to get the volume of liquid

Volume and Density Volume of a regular solid Length Height Width Volume of rectangular block = length x width x height

Volume and Density Volume of a regular solid Length Radius Height Width Volume of rectangular block = length x width x height Volume of a cylinder= π x radius2 x height

Volume and Density Volume of an irregular solid Read off the level on the scale before adding the irregular solid, and again after the solid has been put into the measuring cylinder. Volume of irregular solid = Volume after – volume before Eg. 235 – 155 = 80cm3

Volume of an irregular solid Volume and Density Volume of an irregular solid Using a Eureka (displacement) can Fill the Eureka can until it stops over-flowing. Gently lower the irregular solid into the can and measure how much displaced liquid is collected in the measuring cylinder.

Volume of an irregular solid Volume and Density Volume of an irregular solid Using a Eureka (displacement) can Mass of irregular solid = 350g Volume of irregular solid = 80cm3 Density = mass / volume Density = 350 / 80 = 4.375g/cm3