Aflat uniform circular disk has a mass of 3.97 kg and a radius of 85.7 cm. it is suspended in a horizontal plane by a vertical wire attached to its center. if the disk is rotated 2.42 rad about the wire, a torque of 0.0688 n·m is required to maintain that orientation. calculate
(a) the rotational inertia of the disk about the wire,
(b) the torsion constant, and
(c) the angular frequency of this torsion pendulum when it is set oscillating.

1.457881265 kgm²

0.02842 Nm/rad

0.13962 rad/s

Explanation:

M = Mass = 3.97 kg

R = Radius = 85.7 cm

= Torque = 0.0688 Nm

= Angle of rotation = 2.42 rad

Moment of inertia about the center of the disk is given by

The rotational inertia of the disk about the wire is 1.457881265 kgm²

Torque is given by

The torsion constant is 0.02842 Nm/rad

Time period is given by

Angular frequency is given by

The angular frequency of this torsion pendulum when it is set oscillating is 0.13962 rad/s

show the diagram then i will answer

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.