Scenario a. john, the office manager of greenleaf inc., believes that providing positive consequences for a job well done will increase the likelihood of good work performance in the future. john personally sends e-mails to his employees to commend their efforts when they perform well. ivan, the ceo of intrinsic ideas inc., takes his employees off probation early when they perform to his expectations. fred, the sales manager of kingston corp., often shouts at his employees when they perform poorly. he also fails to appreciate employees when they perform well, which often results in poor performances. fred has failed to appreciate his employees when they perform well, which has resulted in poor performances. this is an example of reinforcement

Negative reinforcment.

Explanation:

In negative reinforcement, the act of exerting negative behavior to extinguish the other is used. In the case of the issue, when Fred shouts at his employees when they perform poorly, he seeks to reinforce through a negative stimulus (the scream) to remove negative behavior from poor performance. But the opposite also occurs when there is good performance of employees and there is no positive reinforcement or the possibility of applying negative stimulus, then there are no stimuli for the expected behavior.

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.

im confused need to go into details plz thx