Which of the following statements best demonstrates the necessity ...

[audragclark]

Which of the following statements best demonstrates the necessity of statistical physics as a valid field of physics?
  a. Physicists are always striving to break problems down into their ultimate constituents, so that all problems from mechanics to nuclear physics can be described by detailing the interactions of individual particles.
  b.When looking at the overall behavior of a complex system, it is always necessary to know the behavior of individual particles first, then the behavior of the system next.
  c.The technology of measurement today is not as good as it will be in the future, so for now we need statistical physics. Later, we may be able to measure everything to arbitrary precision.
  d.The behavior of some particles cannot be measured easily, and when there are many particles, the behavior of the system is of utmost concern.

Question 2

Which of the following statements about the differences between Fermi-Dirac statistics and Bose-Einstein statistics is NOT true?
 

a. Fermi-Dirac statistics and Bose-Einstein statistics both apply to particles with half-integer spin.
  b. Bose-Einstein statistics model particles that do not obey the Pauli exclusion principle.
  c. At very low energies the Bose-Einstein statistical factor is significantly greater than the Fermi-Dirac statistical factor.
  d. Fermi-Dirac statistics model fermions while Bose-Einstein statistics model bosons.

[xiazhe]

Answer to Question 1

d.
The behavior of photons or electrons in a double slit experiment is an example of the difficulty in measuring the behavior of individual particles. The overall action of the system is often the only desired behavior.

Answer to Question 2

a.
This statement is not true. The spin determines the distribution function, with fermions having half-integer spin and bosons integer or zero spin.

[audragclark]

Gracias!

[sultansheikh]

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