University Physics Volume 2

Key Equations

Key Equations

 Linear thermal expansion $ΔL=αLΔTΔL=αLΔT$ Thermal expansion in two dimensions $ΔA=2αAΔTΔA=2αAΔT$ Thermal expansion in three dimensions $ΔV=βVΔTΔV=βVΔT$ Heat transfer $Q=mcΔTQ=mcΔT$ Transfer of heat in a calorimeter $Qcold+Qhot=0Qcold+Qhot=0$ Heat due to phase change (melting and freezing) $Q=mLfQ=mLf$ Heat due to phase change (evaporation and condensation) $Q=mLvQ=mLv$ Rate of conductive heat transfer $P=kA(Th−Tc)dP=kA(Th−Tc)d$ Net rate of heat transfer by radiation $Pnet=σeA(T24−T14)Pnet=σeA(T24−T14)$