Density Flashcards
All 5 cards in this deck
What is the equation for density, including units?
density = mass ÷ volume, ρ = m ÷ V, in kg/m³ (mass in kg, volume in m³).
What do you multiply a density in g/cm³ by to convert it to kg/m³?
- e.g. 2.7 g/cm³ = 2700 kg/m³
Why is a substance usually denser as a solid than as a liquid?
Its particles are closer together and more tightly packed, so there are more particles per unit volume.
True or false? When water boils, the space between the particles increases and the density decreases.
True. Steam particles are much further apart than in water, so steam is less dense.
Which common substance is less dense as a solid than as a liquid?
Water: ice is less dense than liquid water, which is why ice floats.