- aether
- amplitude
- antimatter
- antiparticle
- astrophysics
- atom
- atomic
- attract
- attraction
- ballistics
- beam
- black hole
- buoyancy
- calorie
- calorific
- capillary action
- cathode ray tube
- centre of gravity
- centrifugal force
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- chain reaction
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- conduct
- conduction
- conductive
- conductor
- convect
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- core
- critical mass
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- dense
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- electron
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- focus
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- fusion
- gamma ray
- gravitation
- gravitational
- gravity
- half-life
- hertz
- hydraulic
- Hz
- imaging
- impetus
- inertia
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- ion
- ionize
- kinetic
- laser
- lift
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- liquefy
- lodestone
- magnet
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- magnetize
- mass
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- meltdown
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- phonic
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- photosensitive
- photosensitize
- physical
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- pivot
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- power
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- proton
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- quantum mechanics
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- quark
- radiate
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- radio wave
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- reaction
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- reflect
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- refract
- relativity
- repel
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- repulsive
- resilience
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- resistance
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- retention
- solid-state
- sonic
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- sound wave
- space
- specific gravity
- spectral
- spectroscope
- spectrum
- statics
- steady state theory
- strain
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- surface tension
- tension
- thermodynamics
- thrust
- traction
- trajectory
- transmit
- ultrasonic
- ultrasound
- vacuum
- vaporize
- vapour
- vector
- wave
- wavelength
- work
