Which of the following refers to software designed to alter system files and utilities on a victim’s system with the intention of changing the way a system behaves?

keystroke loggers

backdoors

rainbow tables

rootkits

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

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

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?