Вопрос № 306428 - Английский язык

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What is a crystal? A crystal is a geometrical solid made by a natural process. Many substances absorb water from solutions when they crystallize; that is, they unite chemically with a definite proportion of water. The water with which any substance unites during the process of crystallization is called the water of crystallization.
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What is a crystal?

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Scientists carry out experiments in order to create new minerals with specific crystal shapes and structures.

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Many GPS receivers can relay position data to a PC device.

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Metals are dielectrics.

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Now an ordinary cellphone can handle a range of frequencies, modulation techniques, and encoding schemes.

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Terahertz wave imaging safeguards passengers' privacy.