🌈 Colorful Mind Map of Density & Relative Density | Physics Made Easy

Rainbow Mind Map: Density & Relative Density

DENSITY

• Definition: Density is mass per unit volume of a substance.
• Formula: Density = Mass / Volume
• Units: g/cm³ or kg/m³
• More Density: Means more tightly packed particles
• Measurement: Use beam balance for mass & measuring cylinder for volume
• Water’s Density: 1 g/cm³ or 1000 kg/m³
• Applications: Ship floating, oil separating from water, etc.

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RELATIVE DENSITY

• Definition: Relative density is the ratio of density of a substance to density of water.
• Formula: Relative Density = Density of substance / Density of water at 4⁰C.
• No Unit: It has no units as it’s a ratio
• RD > 1: Substance sinks in water
• RD < 1: Substance floats in water
• Used To: Compare densities without actual measurement
• Applications: Gold purity check, floatation studies, etc.

Check out this YouTube on Relative Density

Challenge Time:
1. A body has a mass of 200 g and volume of 50 cm³. What is its density?
2. If density of a substance is 0.8 g/cm³, what is its relative density?

Type your answers in the comments and help your classmates!