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define density
the mass of an object per unit volume
state the formula for density
ρ = m/v
density of the object (kgm-3) = mass of the object (kg) / volume of the object (m3)
describe how to determine the density of an irregularly shaped object
measure the mass of the object using a digital balance
measure the volume of water in a measuring cylinder
submerge the object in the water
measure the new volume of the water
volume difference = volume of the object
ρ = m/v
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