検索結果- 英語 - 英語
検索内容:
ratchet jack
ratchet wheel
noun
ratchet wrench
noun
Muller's ratchet
noun
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.
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