Density ρ (Edexcel GCSE Physics Combined Science): Flashcards

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3.1.1 Density
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Define density

Mass per unit volume

Density formula (symbols)

ρ=mV\rho = \frac{m}{V}

Symbol for density

ρ\rho (Greek letter rho)

Units of density

kg/m3\text{kg/m}^3 (kilograms per metre cubed)

Equipment to measure mass

Balance

Volume of regular objects: method

Multiply the dimensions

Volume of irregular objects: method

Measure volume of liquid displaced

Equipment for measuring displaced liquid

Eureka can

Equipment to measure liquid volume

Measuring cylinder

Density: solids vs liquids

Similar densities

Density: gases vs solids/liquids

Far lower density

Ice vs water: density exception

Ice has lower density than water

Particle spacing: gases vs solids

Increases ×10\times 10

What stays constant during state changes?

Mass

What does density depend on?

Spacing of atoms in matter

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