Last Updated：2025/12/04
Sentence
ブラウン運動ラチェットの思考実験は、小さな羽根車とラチェットからなる見かけ上の永久機関が系の熱的平衡におけるランダムな熱ゆらぎから有用な仕事を取り出せるかのように見えるが、そのような仕事の取り出しが熱力学第二法則に違反する理由を示している。
Quizzes for review
The thought experiment of the Brownian ratchet illustrates why extracting useful work from thermal fluctuations would violate the second law of thermodynamics.
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The thought experiment of the Brownian ratchet illustrates why extracting useful work from thermal fluctuations would violate the second law of thermodynamics.
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Related words
Brownian ratchet
Noun
(physics)
An
apparent
perpetual
motion
machine,
the
subject
of
a
thought
experiment,
that
would
consist
of
a
tiny
paddle
wheel
and
a
ratchet,
and
might
seem
to
be
able
to
extract
useful
work
from
random
fluctuations
(heat)
in
a
system
at
thermal
equilibrium,
in
violation
of
the
second
law
of
thermodynamics.
Japanese Meaning
(物理学) ブラウン運動（微視的なランダムな熱振動）を利用して、見かけ上永続的な運動をするように見える装置の概念。具体的には、微小なパドルウィールとラチェットから構成され、熱平衡状態にある系におけるランダムな熱揺らぎから仕事を抽出できるかのように見えるが、これは熱力学第二法則に反するという点が強調される思考実験上の機構
Related Words
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