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Tomtit [17]
3 years ago
15

Si un automóvil logra una potencia util promedio de 250kw y se sabe que tiene un rendimiento energético del 25%. ¿Cuanta energia

total consume en 1 min? Exprese el resultado en kj
Physics
1 answer:
Jet001 [13]3 years ago
8 0

Answer:

  W = 3.75 kJ

Explanation:

Power is defined by the relational

          P = W / t

          W = P t

the yield is 25% = 0.25

           W = 0.25 Wo

           W = 0.25 250 60

           W = 3750 J

            W = 3.75 kJ

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Consider a steel guitar string of initial length L=1.00L=1.00 meter and cross-sectional area A=0.500A=0.500 square millimeters.
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From the question we are told that

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     The area is  A = 0.500 mm^2 = \frac{0.500}{1 *10^6} = 0.500*10^6 \ m^2

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The Young modulus is mathematically represented as

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Where \sigma is the stress which is mathematically represented as

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Substituting values

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Substituting these into the equation above

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          \Delta L = \frac{3.0*10^9  * 1}{2.0 *10^{11}}

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