What is the total energy of a 175,000 kg shuttle orbiting the Earth at 600 km above Earth’s surface? (Choose the closest answer) A -2.46 x 1012

B -3.46 x 1012

C -8.46 x 1012

D -5.46 x 1012

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

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)