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horrorfan [7]
2 years ago
6

Which energy changes take place when a pedaling cyclist uses a generator (dynamo) to light his bicycle

Physics
2 answers:
Archy [21]2 years ago
8 0
At the same time when the generator lights up the bicycle lamp the lamp is light up using electrical energy so mechanical energy is also transformed in to electrical energy.
Fynjy0 [20]2 years ago
4 0

When the pedaling cyclist uses a generator (dynamo) to light his bicycle lamp, the energy change is from mechanical to electrical.

<h3>Law of conservation of energy</h3>

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

Thus, we can conclude the following as it relates to energy changes;

  • When the pedaling cyclist uses a generator (dynamo) to light his bicycle lamp, the energy change is from mechanical to electrical.

Learn more about conservation of energy here: brainly.com/question/166559

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Answer:

A) 60%

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   v2 = 0.348 m^3

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   Q2-3 = 60 kJ

Explanation:

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  Л = 1 - \frac{Tl}{Th}  

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B) calculate the pressure and volume at the beginning of the isothermal expansion

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= P3v3 = mRT3  ----- (1)

v3 = 0.4m , mR = 2* 0.287, T3 = 750

hence P3 = 1076.25

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Qex = p3v3 ln( p2/p3 )

60 = 1076.25 * 0.4 ln(p2/p3)

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p2v2 = p3v3

v2 = p3v3 / p2

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  = 0.348 m^3

C) calculate the work and heat transfer for each four processes

work :

W1-2 = mCv( T2 - T1 )

        = 2*0.718 ( 750 - 300 ) = 1615.5 kJ

W3-4 = 1615.5 kJ

heat transfer

Q2-3 = W2-3 = 60KJ

Q3-4 = 0

D ) sketch of the cycle on p-V coordinates

attached below  

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