HELP ME PLEASE Unit Activity

Unit: Exploring Career Options

This activity will help you meet these educational goals:
Content Knowledge—You will research career optionsin different career clusters and pathways.
Inquiry—You will conduct online research in which you will collect information, make observations, and communicate your results in written form.
21st Century Skills—You will employ online tools for research and analysis, use critical-thinking skills, and communicate effectively.

Introduction
In this activity, you will research and choose three career pathways that are suited to your personality and natural talents. Then, you will determine the academic requirements, the skills you would need, and colleges or training programs for each of the three career pathways.



Directions and Analysis
Task 1: Academic Requirements for Your Career
Choose three career clusters that interest you and that you think you are suited for, considering your natural talents and personality traits. Choose a career pathwayor a specific career within each cluster and determine the academic requirements for an entry-level job in each pathway. You may use this jobs information network to identify the academic requirements.

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Task 2: Skills for Your Career
Identify the skills that you would need to acquire for success in each of the career pathways that you chose in the previous task. You may use this jobs information networkto complete this task.

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Task 3: Training Programs for Your Career
Research and list at least three colleges or training programs in your state for each of your chosen career pathways. Then, for each career pathway determine which school would be the best choice for you, and why.

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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.

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