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3 years ago

13

Why does a siren have a higher pitch as it approaches you?

2 answers:

Airida [17]3 years ago

7 0

Answer:

Apparent Increase in Wave Frequency

As the ambulance approaches you, the distance between the source of the waves and the observer decreases. Consequently, the siren sounds more shrill as the pitch of the wailing siren 'sounds' higher than its original value, as sound waves reach you 'more frequently'.

Step-by-step explanation

hope this helps

Ainat [17]3 years ago

6 0

Answer: C. The crests of the sound wave are spaced closer together.

Step-by-step explanation:I took the test.

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Step-by-step explanation

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Rainbow [258]

Answer:

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Step-by-step explanation:

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3 years ago

What is the exact value of sin 45° ?<br><br>enter your answer, as a simplified fraction.

Ne4ueva [31]

Look at the picture.

Use the Pythagorean theorem:

$b^2=a^2+a^2\\\\b^2=2a^2\to b=\sqrt{2a^2}\\\\b=\sqrt{a^2}\cdot\sqrt2\\\\b=a\sqrt2$

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substitute

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3 years ago

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lys-0071 [83]

Answer:

wheres the diagram..?

Step-by-step explanation:

..i think you forgot the diagram lol

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3 years ago

Read 2 more answers