Volume by Displacement
Measuring Irregular Objects
Discover how to measure the volume of irregularly shaped objects using water displacement. Select an object and observe how the water level changes to reveal the object's volume!
Initial Volume: 50 mL
Displaced Volume: 0 mL
Displaced Volume: 0 mL
Observation:
The stone displaced 25 mL of water, revealing its volume is 25 cm³.
The Displacement Method
How It Works:
- Measure initial water volume (V₁)
- Submerge the object completely
- Measure new water volume (V₂)
- Calculate volume: V_object = V₂ - V₁
Example Calculation:
Initial Volume = 50 mL
Final Volume = 75 mL
Object Volume = 75 mL - 50 mL = 25 mL = 25 cm³
Initial Volume = 50 mL
Final Volume = 75 mL
Object Volume = 75 mL - 50 mL = 25 mL = 25 cm³
Key Concepts:
- 1 mL of water = 1 cm³ of volume
- Works for any irregularly shaped object
- Object must be fully submerged
- No complex measurements needed
Historical Note:
Archimedes famously used this method to verify the purity of a gold crown, discovering the principle while bathing.
Real-world Applications:
- Geology: Measuring rock and mineral volumes
- Manufacturing: Quality control for irregular parts
- Forensics: Analyzing evidence volume
- Education: Teaching volume concepts