This lecture covers the dynamics of thermal effects, including the thermal time constant, thermal conductivity, and dissipated power per volume. It discusses models for convective systems, inkjet heaters, planar heater modeling, micro heaters for gas sensing, PCR for DNA amplification, and thermal proximity sensing. The lecture also explores cooling time constants, IR sources for gas sensing, and electro-thermal actuators. Various examples and applications are presented, such as the 'Millipede' IBM technology and the use of thermal bimorphs in electro-thermal actuators.