lagrangian of simple harmonic oscillator and coupled oscillator

[@richardgogoi1577]

Sir,
from where can I get some decent notes for 'Physics of devices and instruments' paper (5th sem)

[@saniyasaniyaparveen3394]

Sir please make joule thomson cooling topic real gases

[@mrinalofficial4941]

Sir bhtt din pst classical r bhtt need asil

[@madhujyarajkhowa4961]

Sir apuni ki pohi asa yatia