In a computer numerical control (CNC) machine, if the tool has to move downward and then rotate counter-clockwise around the vertical axis, along which of the following axes would it move?
A. X-axis, B axis
B Z-axis, Caxis
c. Z-axis, A axis
D. y-axis, A axis

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)