Density (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Density
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Define density

Mass per unit volume

Density formula

ρ=mV\rho = \frac{m}{V}

Symbol for density

ρ\rho (rho)

Units of density

kg/m3\text{kg/m}^3

Units: mass & volume in density formula

kg\text{kg} for mass, m3\text{m}^3 for volume

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 volume

Eureka can

Equipment to measure liquid volume

Measuring cylinder

Density of solids vs liquids

Similar densities

Exception: ice vs water density

Ice has lower density than water

Gas density vs solids/liquids

Far lower density

Atom spacing increase: gases vs solids

Increases by factor of ×10\times 10

Mass during change of state

Stays the same

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