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density meaning
mass per unit volume
density formula (words)
density = mass ÷ volume
density formula (symbols)
ρ = m ÷ V
density units
kg/m³
1 g/cm³ in kg/m³
1000 kg/m³
volume of cube
length × width × height
volume of cylinder
πr²h
volume of sphere
4/3 πr³
reason gases low density
particles far apart
example
mass 50 g volume 25 cm³ density = 2 g/cm³
high density meaning
lots of mass in small volume
low density meaning
little mass in large volume
solid vs gas density
solids have tightly packed particles
density triangle
m on top, ρ and V on bottom
key idea
density depends on mass and volume