What factors should be considered in quadcopter motor selection?
A) Voltage that matches battery and motor amp-hours
B) Amperage and weight
C) Maximum revolutions per minute and torque rating
D) Power-to-weight ratio and pitch

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false