Archimedes' principle can be used to calculate the density of a fluid as well as that of a solid. Suppose a chunk of iron with a mass of 435.0 g in air is found to have an apparent mass of 397.1 g when completely submerged in an unknown liquid. (a) What mass (in g) of fluid does the iron displace? (b) What is the volume of iron (in cm3), using its density as given in this table? (c) Calculate the fluid's density and identify it. water ethyl alcohol     petrol glycerin olive oil

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Archimedes' principle can be used to calculate the density of a fluid as well as that of a solid. Suppose a chunk of iron with a mass of 435.0 g in air is found to have an apparent mass of 397.1 g when completely submerged in an unknown liquid.
(a)
What mass (in g) of fluid does the iron displace?
(b)
What is the volume of iron (in cm3), using its density as given in this table?
(c)
Calculate the fluid's density and identify it.
  • water
  • ethyl alcohol    
  • petrol
  • glycerin
  • olive oil
Densities of Various Substances
p(103 kg/m³ or g/mL)
p(10³ kg/m³ or g/mL)
p(10³ kg/m³ or g/mL)
Substance
Substance
Substance
Solids
Liquids
Gases
Water (4°C)
1.29×10-3
Aluminum
2.7
1.000
Air
Carbon
dioxide
Brass
8.44
Blood
1.05
1.98×10-3
Copper
(average)
Carbon
monoxide
1.25×10-3
8.8
Sea water
1.025
Gold
Hydrogen
0.090x10-3
19.32
Mercury
13.6
Iron or steel
7.8
Ethyl alcohol
0.79
Helium
0.18×10-3
Lead
Petrol
Methane
0.72×10–3
11.3
0.68
Polystyrene
0.10
Glycerin
1.26
Nitrogen
1.25×10-3
Tungsten
19.30
Olive oil
0.92
Nitrous oxide
1.98×10-3
Uranium
18.70
Охудеn
1.43×10-3
Steam
Concrete
0.60x10-3
2.30-3.0
(100° C)
Cork
0.24
Glass,
common
2.6
(average)
Granite
2.7
Earth's crust
3.3
Wood
0.3-0.9
Ice (0°C)
0.917
Bone
1.7-2.0
Transcribed Image Text:Densities of Various Substances p(103 kg/m³ or g/mL) p(10³ kg/m³ or g/mL) p(10³ kg/m³ or g/mL) Substance Substance Substance Solids Liquids Gases Water (4°C) 1.29×10-3 Aluminum 2.7 1.000 Air Carbon dioxide Brass 8.44 Blood 1.05 1.98×10-3 Copper (average) Carbon monoxide 1.25×10-3 8.8 Sea water 1.025 Gold Hydrogen 0.090x10-3 19.32 Mercury 13.6 Iron or steel 7.8 Ethyl alcohol 0.79 Helium 0.18×10-3 Lead Petrol Methane 0.72×10–3 11.3 0.68 Polystyrene 0.10 Glycerin 1.26 Nitrogen 1.25×10-3 Tungsten 19.30 Olive oil 0.92 Nitrous oxide 1.98×10-3 Uranium 18.70 Охудеn 1.43×10-3 Steam Concrete 0.60x10-3 2.30-3.0 (100° C) Cork 0.24 Glass, common 2.6 (average) Granite 2.7 Earth's crust 3.3 Wood 0.3-0.9 Ice (0°C) 0.917 Bone 1.7-2.0
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