Alert Security Services Co. offers security services to business clients. The trial balance for Alert Security Services Co. has been prepared on the end-of-period spreadsheet for the year ended October 31, 2016 shown below.

The data for year-end adjustments are as follows:

- Fees earned, but not yet billed, $13.

- Supplies on hand, $4.

- Insurance premiums expired, $10.

- Depreciation expense, $3.

- Wages accrued, but not paid, $1.

Required: In the table below, enter the adjustment data, and place the balances in the Adjusted Trial Balance columns.

Alert Security Services Co.
End-of-Period Spreadsheet
For the Year Ended October 31, 2016
Unadjusted Trial Balance Adjustments Adjusted Trial Balance
Debit Credit Debit Credit Debit Credit
Cash 12
Accounts receivable 90
Supplies 8
Prepaid insurance 12
Land 190
Equipment 50
Accum. Depreciation - Equipment 4
Accounts payable 36
Wages payable 0
Brenda Schultz, Capital 260
Brenda Schultz, Drawing 8
Fees earned 200
Wages expense 110
Rent expense 12
Insurance expense 0
Utilities expense 6
Supplies expense 0
Depreciation expense 0
Miscellaneous expense 2
500 500

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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