A CD spins at a constant angular velocity of 5.0 revolutions per second counterclockwise. Which
of the following statements about the CD is true?
O
A net torque acts on it counterclockwise to keep it moving.
O No net torque acts on it at all.
O
A net torque acts on it clockwise to keep it moving.

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race