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Lelu [443]
3 years ago
5

Describe how air particles differ in the way they move when air begins to cool.

Physics
1 answer:
grin007 [14]3 years ago
7 0
<span>when air cools , the temperatures drops, the molecules move slowly taking up less space , the amount of space the air  takes ups shrinks , or reduce the air pressure 
</span>
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If we find v=Al, where l is a length and v is a speed, what are the SI units for A?
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I think the SI unit of A is m^2/s

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A laser on the South American plate takes a certain amount of time to reach a satellite and bounce back to Earth. Five years lat
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Q11:A police car in hot pursuit goes speeding past you. While the siren is approaching, the frequency of the sound you hear is 5
natulia [17]

Answer:

   v_s = 34.269 m / s

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This is a Doppler effect exercise, in this case the observer is fixed and the sound source is moving.

         f ’= f  \frac{v}{v  \mp v_s  }

where the negative sign is used for when the source approaches the observer and the positive sign for when the source moves away from the observer

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          5500 = f (\frac{v}{v - v_s })

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let's solve these two equations

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           1.222 (v-v_s) = v + v_s

            v_s (1+ 1.22) = v (1.222 -1)

            v_s = v   \frac{0.222}{2.223}

the speed of sound in air is v = 343 m / s

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4 0
3 years ago
To be Answered in Sentences...
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I did the Exam and made a 100% with these answers.

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