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Free_Kalibri [48]
2 years ago
7

In which states of matter will a substance have a fixed volume?

Physics
1 answer:
NISA [10]2 years ago
7 0

Answer:

A. liquid and solid

Explanation:

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(C) The frequency decrease and intensity decrease

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The Doppler effect describes the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source, or the wave source is moving relative to the observer, or both.

if the observer and the source move away from each other as is the case for this problem, the wavelength heard by the observer is bigger.

The frequency is the inverse from the wavelength, so the frequency heard will increase.

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