Ahome heating system can be controlled by a thermostat. identify two other feedback control systems that can be found in most residences. describing briefly how each control system works, identify the sensor, controller, and actuator (the means by which the manipulated variable is controlled). identify the controlled variable and manipulated variable in each case, as well as a potential disturbance (remember: disturbance variables are factors that are accounted for in overall mass or energy balances, not bizarre fantasy impacts).

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?