th e ro o t- m ea n - sq u ar e- sp e ed a n d th e m o stРp r ob ab le sp ee d in d iffere n t d im en sio n s b y u sin g m a x w e ll’s d istrib u tio n la wРZ H O U K a ih o n gР( Scho o l o f P hy sics a n d Electr o n ic In fo rma tio n , Y u n n a n N o rm a l U n iv er sity, Chin a Ku n min g 6 5 0 0 9 2 )РA B S T RA CT : T he sp eed dis t r ibu tio n fu n ctio n a n d the three cha ra ct erist ic speeds ( the a vera ge speed,?the ro o t- mea n - squ a re sp eed a n d the mo st pro ba ble s peed) o f ga s mo lecu les in o n e dim en sio n , tw o?dimen sio n s a n d three dimen sio n s a re dis cu ss ed by u sin g M a xw ell’s distribu tio n la w .?KEY W ORD S : Ma xw el l’s distr ibu tio n la w ; the a vera ge s peed; the r o o t- mean - squ a re speed; the?mo st pro ba ble sp eed
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