Topic Summaries
Column pressure
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
- As an object falls to a lower depth in a liquid, the pressure the liquid exerts on it increases. This is because there is a greater weight of liquid above the object.
- The pressure an object experiences at the bottom of a column of water is given by \(\text{pressure}=\text{height of column}\times\text{density of liquid}\times\text{gravitational field strength}\) or \(p=h\rho g\) where:
- \(p\) is the pressure in pascals, Pa
- \(h\) is the height of the column in m
- \(\rho\) is the density of the liquid in kg/m3
- \(g\) is the gravitational field strength in N/kg
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