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Ede4ka [16]
3 years ago
11

A loudspeaker in a parked car is producing sound whose frequency is 20 510 Hz. A healthy young person with normal hearing is sta

nding nearby on the sidewalk but cannot hear the sound because the frequency is too high. When the car is moving, however, this person can hear the sound. (a) Is the car moving toward or away from the person
Physics
1 answer:
Vsevolod [243]3 years ago
4 0

Answer:

The car must be moving away from the person.

Explanation:

From Doppler's Effect, we know that when a sound source moves towards a stationary observer, the apparent frequency of that sound increases. While the apparent frequency decreases if the source moves away from the stationary observer.

The audible range of frequencies for a human ear is 20 Hz to 20000 Hz. Therefore, in order for the sound of a loud speaker to be audible for the person, the frequency must decrease below 20000 Hz.

<u>Due to this reason, the car must be moving away from the person.</u>

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3 years ago
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Answer : The correct degree of precision is 272.94 g.

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For Example: If you weigh a given substance five times and you get 2.7 kg each time. Then the measurement is said to be precise.

Level of precision is determined by the maximum number of decimal places.

In the given figure, the value of mass of object is 280 g. From the given options we conclude that the 272.94 g is more close to 280 g and has maximum number of decimal places. So, 272.94 g measurement is said to be precise.

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She presents symptoms of <u>disorganized schizophrenia</u> since her behavior is chaotic and is not organized around themes that are maintained over time.

<h2>What is disorganized schizophrenia?</h2>

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  • The person presents language disorganization that affects thinking and cognitive processes.

Therefore, we can conclude that the presence of inappropriate emotional expressions, disorganized language, and motivational deficits are symptoms of disorganized schizophrenia.

Learn more about schizophrenia here: brainly.com/question/15401779

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