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Elodia [21]
4 years ago
12

Calculate the distance in km that Charlie runs if he maintains the average speed from question 2 for 1 hour

Physics
2 answers:
egoroff_w [7]4 years ago
5 0
Sorry, but what is question 2?
weqwewe [10]4 years ago
4 0

Distance covered by charlie= 2 km

Explanation:

we know that

d= v\times t

d= distance

t= time= 1 hour

v= velocity= 2 km/h

so distance d= 2 km/h (1 h)

d=2 km

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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:

a

 COP = 8.49

b

  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  

8 0
3 years ago
The velocity of a mass moving in a circular path is..
Alenkasestr [34]
Constantly changing.
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3 years ago
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