Topic Summaries
Density
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
- The density of an object is given as density = mass volume or \(\rho=\dfrac{m}{v}\) where:
- \(\rho\) is the density of an object in kg/m³
- \(m\) is its mass in kg
- \(V\) is its volume in m³
- Density is a property of a material. We say steel is heavier than plastic because steel has a higher density.
- Density is partially dependent on the atomic mass of the molecules making up a material.
- Determining the density of irregularly shaped objects requires measuring their volume. This can be done by placing them in a measuring cylinder filled with water and measuring the change in volume.
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