Which two statements describe reasons that semiconductors must be

Physics

2 answers:

Cerrena [4.2K]4 years ago

6 0

Answer:

They provide a source of electrons to be released by the photoelectric effect, and They provide a path through which released electrons move to form an electric current.

Explanation:

A p e x

stepladder [879]4 years ago

6 0

Answer:

The answer is B. They provide a source of electrons to be released by the photoelectric effect, and D.They provide a path through which released electrons move to form an electric current.

Explanation:

I took AP EX quiz.

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A truck moving at 36 m/s passes a police car moving at 45 m/s in the opposite direction. If the frequency of the siren is 500 Hz

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Answer:

change in frequency is 636 Hz

Explanation:

given data

speed v1 = 36 m/s

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