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The science of sound (wl)

Sound wave — a vibration in the air, in water, etc. that we hear as sound
Speed — the rate at which somebody/something moves or travels
Sonic boom — the explosive sound that is made when an aircraft travels faster than the speed of sound
Energy — a source of power, such as fuel, used for driving machines, providing heat, etc.
Transverse wave — a wave that vibrates at 90° to the direction in which it is moving
Longitudinal wave — a wave that vibrates in the direction that it is moving
Supersonic — faster than the speed of sound
Molecule — a group of atoms that forms the smallest unit that a substance can be divided into without a change in its chemical nature

Definition of sound wave from the Oxford Advanced Learner's Dictionary [ ]
Definition of speed from the Oxford Advanced Learner's Dictionary [ ]
Definition of sonic boom from the Oxford Advanced Learner's Dictionary [ ]
Definition of energy from the Oxford Advanced Learner's Dictionary [ ]
Definition of transverse wave from the Oxford Advanced Learner's Dictionary [ ]
Definition of longitudinal wave from the Oxford Advanced Learner's Dictionary [ ]
Definition of supersonic from the Oxford Advanced Learner's Dictionary [ ]

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