Represent the following sentence by a Boolean expression:
“In a battery-powered computer, the disk drive motor 1 should be on if and only if
(a) There is a disk in the drive, and
(b) The disk drive is closed, and
(c) The disk drive motor 2 is not on, and
(d) The battery low signal is not present, and
(e) The computer has started a read operation, or the computer has started a write operation.”

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed

Different between boring and turning?