The deckers clothing company produces men’s pajamas and ladies’ nightgowns. pajamas are made in sets of shirts and pants while nightgowns are one-piece. each pajama shirt requires 2 yards of cloth and each pair of pajama pants requires 3 yards of cloth, while each nightgown requires 4 ½ yards of cloth. during the next three months the following demands for pajama shirt and pants pairs must be met on time: month 1, 140,000 sets; month 2, 155,000 sets; month 3, 170,000. for nightgowns the monthly demands are 100,000, 140,000, and 120,000, respectively. in each month 1.3 million yards of cloth are available for purchase. of course, deckers can elect to purchase less than these amounts. in each month it costs $8 to make a set of pajamas on regular time and $11 to make a set on overtime. for nightgowns the regular and overtime costs are $6 and $9. additionally, in each month the total number of nightgowns and pajama sets together can be no more than 150,000 produced on regular time, but an unlimited number can be produced on overtime. at the end of each month a holding cost of $1 per product set is assessed. formulate and solve the mathematical programming model to determine how to meet demand for pajamas at the minimum possible cost. assume there are 15,000 sets of pajamas and 9,000 nightgowns available in inventory at the beginning of month 1.

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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i hope this i spelt things wrong i believe but this is why

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this website has me so much feel free to keep asking questions

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explanation:

reducti0n

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