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2 years ago

How does the ringing sound of a telephone travels from the phone to your ear

Physics

2 answers:

lilavasa [31]2 years ago

8 0

Answer:

Sound produced by a vibrating object reaches our ear through sound waves which propagate through the medium as a series of compression and rarefaction.

Auditory receptors receptors receive vibrations from telephone and they are passed to ear drum which then passes it auditory ossicles which then passes it to fluid of cochlea which then basilar membrane and then finally it reaches to hair cells. Then the sound is heard

AysviL [449]2 years ago

5 0

Sound waves travel through the air to your eardrum

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What would be the coefficient of performance if the refrigerator (operating between the same temperatures) was instead used as a

viktelen [127]

Complete Question

A certain refrigerator, operating between temperatures of -8.00°C and +23.2°C, can be approximated as a Carnot refrigerator.

What is the refrigerator's coefficient of performance? COP

(b) What If? What would be the coefficient of performance if the refrigerator (operating between the same temperatures) was instead used as a heat pump? COP

Answer:

$COP = 8.49$

$COP_1 = 9.49$

Explanation:

From the question we are told that

The lower operation temperature of refrigerator is $T_1 = -8.00^oC = 265 \ K$

The upper operation temperature of the refrigerator is $T_2 = 23.2 ^oC = 296.2 \ K$

Generally the refrigerators coefficient of performance is mathematically represented as

$COP = \frac{T_1}{T_2 - T_1 }$

=> $COP = \frac{265}{296.2 - 265 }$

=> $COP = 8.49$

Generally if a refrigerator (operating between the same temperatures) was instead used as a heat pump , the coefficient of performance is mathematically represented as

$COP_1 = \frac{T_2}{ T_2 - T_1}$

=> $COP_1 = \frac{296.2}{ 296.2 - 265 }$

=> $COP_1 = 9.49$

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3 years ago

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