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📘 Density is mass divided by volume

rho = m/V. Same volume, different mass — different density. Keep the units visible.

3
lessons
~15 min
to learn
Adults
level
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What you’ll learn

  1. Define and measureDefine density and measure mass and volume with appropriate lab tools.rho = m/V; balances measure mass, rulers and cylinders measure regular volume.
  2. Volume and unitsUse displacement, unit conversion, and a complete density calculation.Irregular solids use water displacement; 1 mL = 1 cm3 exactly; report sensible significant figures.
  3. Identify and applyCompare measured density to references and apply a repeatable workflow.Floating shows lower average density, not unique identity; precision in both inputs controls the answer.

Questions this course answers

Which equation defines density?

Density is the amount of mass per unit volume.

How is an irregular object's volume found by displacement?

The rise in liquid level equals the submerged object's volume.

Which equality is exact?

A milliliter and a cubic centimeter represent the same volume.

A sample is 20.0 g and 5.0 mL. What is its density?

Divide 20.0 g by 5.0 mL to get 4.0 g/mL.

What does floating alone establish?

Floating indicates a lower average density, not a unique material.

Grounded in trusted sources

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Related courses

⚖️How Does Density Work?📘A heating curve maps temperature against added heat📘Momentum belongs to a defined system📘Start by isolating one object📘Voltage, current, and resistance name different roles📘Trace nodes before you add📘Read the wave as a repeating pattern📘Start with the normal line

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