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.

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

In an experiment, how can i change human errors? be specific.

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b