Examlex
An electron with kinetic energy 589 keV collides with a positron of the same kinetic energy moving in the opposite direction. Calculate the wavelength of the two identical photons produced in the annihilation.
Transformational Grammar
A linguistic theory concerning how deep structures of language are transformed into various surface structures through grammatical rules.
Language
A system of communication that uses grammar and vocabulary to convey meaning through the use of spoken, written, or gestural symbols.
Sign Language
A language that uses manual communication and body language to convey meaning, primarily used by deaf and hard-of-hearing individuals.
Speak
The act of producing sounds that form words in order to convey information or express thoughts and feelings.
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