The heat flux through a wood slab 50 mm thick, whose inner and outer surface temperatures are 40 and 20 C, respectively, has been determined to be 40 W/m2 . What is the thermal conductivity of the wood?
3.Process Management A process can be thought of as a program in execution. A process will need certain resources—such as CPU time, memory, files, and I/O devices —to accomplish its task. These resources are allocated to the process either when it is created or while it is executing. A process is the unit of work in most systems. Systems consist of a collection of processes: operating-system processes execute system code, and user processes execute user code. All these processes may execute concurrently. Although traditionally a process contained only a single thread of control as it ran, most modern operating systems now support processes that have multiple threads. The operating system is responsible for several impo