I've got a riddle for you
i always run but never walk, i sometimes sing but cannot talk, no head on which a hat to place, you always look me in the face. what am i?

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

What is the main objective of using reheat rankine cycle?

With increases in magnification, which of the following occur? a. the field of view decreases. b. the ambient illumination decreases. c. the larger parts can be measured. d. the eyepiece must be raised.