Figure P 10.5-9 shows an ac circuit represented in both the time domain and the frequency domain. Suppose Z1 15:3ff24:1 V and Z2 14:4ff53:1 V Determine the voltage v(t) and the values of R1, R2, L, and C. + R1 R2 C 15 cos 20t V v(t) L + + V( ) + Z1 Z2 15 0 V Figure P 10.5-9
1.0 Introduction to Operating Systems. An operating system is a program that manages a computer’s hardware. It also provides a basis for application programs and acts as an intermediary between the computer user and the computer hardware. An amazing aspect of operating systems is how they vary in accomplishing these tasks. Mainframe operating systems are designed primarily to optimize utilization of hardware. Personal computer (PC) operating systems support complex games, business applications, and everything in between. Operating systems for mobile computers provide an environment in which a user can easily interface with the computer to execute programs. Thus, some operating systems are designed to be convenient, others to be efficient, and others to be some combination of the two. Be