Consider the discrete signal x(n) = V3 cos (5πn)
Specify the condition which must satisfy for the signal x(n) to be periodic, and if applicable, give the period of the signal.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.

The process in which the system pressure remain constant is called a)-isobaric b)-isochoric c)-isolated d)-isothermal