Timothy is a construction worker in one of the leading firms of a city. His employment contract includes a clause that says he cannot work as a construction worker within the city for fifteen years once he leaves the company.

This clause is:

A) Only illegal if it violates state or federal antitrust laws.

B) Illegal as a contract in restraint of trade.

C) Legal because the employer can add any constraint to the agreement.

D) Illegal as it is injurious to public service.

A clause that says Timothy (A construction worker) cannot work as a construction worker within the city for fifteen years once he leaves the company  is Legal because the employer can add any constraint to the agreement.

Explanation:

The provisions of employment contracts usually include an explanation of compensation, penalties and in peculiar cases post-employment clause.

Post-employment clause usually comes with additional benefits like payment of severance.

Enforcing an employment contract varies according to state laws. For this reason, before entering into a written employment contract, clean employee has to be clear on the terms and provisions of the contract because once you append your signature to any provision stipulated by the employer in the contract, it is binding.

Post-employment restrictive covenants are only useful to the employer if they can be enforced. Continued payment of severance often provides the employer with leverage when trying to enforce restrictive covenants in an employer's contract.  

Generally, the employer and employee must be in compliance with the employment contract.

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.