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Sonbull [250]
3 years ago
11

Find the average energy E for (a) An n-state system, in which a given state can have energy 0,,2,...,n . (b) A harmonic oscillat

or, in which a given state can have energy 0,,2,...(i.e., with no upper limit).
Physics
1 answer:
kicyunya [14]3 years ago
4 0

Answer:

a♦1  E_average = n E₀ / 2 , b) E_average= infinity

Explanation:

The energy values ​​form an arithmetic series, whose sum is

          S = n (a₁ + aₙ) / 2 = n (2a₁ + (n-1) r)/ 2

Where n is the number of terms, a₁ is the first term, aₙ the last term and r is the difference between two consecutive numbers in the series

          r = 2E₀ - 0 = 2E₀

Therefore the sum is

       S = n (0 + n E₀) / 2

      S = n² E₀ / 2

     

The average value is

         E_average = S / n

         E_average = n E₀ / 2

b) the case of harmonic oscillation

We have two possibilities.

- if we take a finite number and terms gives the same previous value

- If we take an infinite number of fears the series gives infinity and the average is also infinite

          E_average= infinity

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Answer:

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Explanation:

Given that

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We know that work done by gas given as

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W= - 0.72 KJ

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ΔU=Change in the internal energy

Now by putting the values

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ΔU= 720 - 390  J

ΔU= 330 J

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