11.4 The noninverting buffer op-amp configuration shownin Fig. Pl 1.4 provides a direct implementation of the feedbackloop of Fig. 11.1. Assuming that the op amp has infiniteinput resistance and zero output resistance, what is /?If A= 1000, what is the closed-loop voltage gain? What is theamount of feedback (in dB)? For Vx = 1 V, find Vo and Vz. If A decreases by 10%, what is the corresponding percentage

The higher the astm grain size number, the finer the gran is. a)-true b)-false

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.