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AquaChek TruTest Digital Pool Spa Test Strip Reader 2932400
AquaChek TruTest Digital Pool Spa Test Strip Reader 2932400
$45.99
Time Remaining: 11d 23h 10m
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AquaChek Tru Test Digital Test Strip Reader Spa  Pool
AquaChek Tru Test Digital Test Strip Reader Spa Pool
$44.99
Time Remaining: 8d 15h 54m
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3 4 DAY SHIP Aquachek TruTest Tru Test Digital Test Strip Reader Pool Chlorine
3 4 DAY SHIP Aquachek TruTest Tru Test Digital Test Strip Reader Pool Chlorine
$47.99
Time Remaining: 3d 23h 19m
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AquaChek TruTest POOL  SPA TEST STRIPS 50ct
AquaChek TruTest POOL SPA TEST STRIPS 50ct
$7.99
Time Remaining: 18h 4m
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AquaChek TruTest Refill Strips 100ct
AquaChek TruTest Refill Strips 100ct
$14.99
Time Remaining: 22d 19h 38m
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Solaxx SafeDip Digital Chemistry Tester for Pools and Spas MET01A
Solaxx SafeDip Digital Chemistry Tester for Pools and Spas MET01A
$179.99
Time Remaining: 8d 22h 43m
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AquaChek Digital Trutest 2510400 Test Strip Reader Aqua Check
AquaChek Digital Trutest 2510400 Test Strip Reader Aqua Check
$45.99
Time Remaining: 19d 16h 53m
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AquaChek TruTest Digital Test Strip Reader w 10 Strips
AquaChek TruTest Digital Test Strip Reader w 10 Strips
$46.00
Time Remaining: 8d 15h 50m
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AquaChek TruTest Digital Pool Spa Test Strips 50ct 512082
AquaChek TruTest Digital Pool Spa Test Strips 50ct 512082
$9.99
Time Remaining: 11d 23h 32m
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AquaChek Tru Test Digital Test Strip Reader Spa  Pool
AquaChek Tru Test Digital Test Strip Reader Spa Pool
$42.95
Time Remaining: 3d 2h 31m
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Trutest Tru Test Aquachek Aquacheck Digital Test Strip
Trutest Tru Test Aquachek Aquacheck Digital Test Strip
$48.50
Time Remaining: 9d 15h 6m
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AquaChek TruTest Digital Test Strip Reader 2932400
AquaChek TruTest Digital Test Strip Reader 2932400
$52.99
Time Remaining: 28d 17h 15m
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AQUACHEK TRU TEST DIGITAL CHLORINE READER REFILL AQUACHECK TRUTEST 50 STRIPS
AQUACHEK TRU TEST DIGITAL CHLORINE READER REFILL AQUACHECK TRUTEST 50 STRIPS
$9.29
Time Remaining: 8d 22h 10m
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AquaChek TruTest Digital Reader Pool Test Strips 50 qty
AquaChek TruTest Digital Reader Pool Test Strips 50 qty
$11.99
Time Remaining: 11d 16h 2m
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Aquachek Pool Chemical Test Strips Digital Reader
Aquachek Pool Chemical Test Strips Digital Reader
$52.99
Time Remaining: 11d 19h 27m
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New TruTest Digital Test Strip Reader From AquaChek
New TruTest Digital Test Strip Reader From AquaChek
$44.95
Time Remaining: 2d 15h 58m
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2 TWO AquaChek TruTest POOL  SPA TEST STRIPS 50ct
2 TWO AquaChek TruTest POOL SPA TEST STRIPS 50ct
$15.99
Time Remaining: 4d 5h 18m
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Aquachek TruTest AquaCheck Tru Test Strips Pool Chlorine PH Bromine Alk 50ct
Aquachek TruTest AquaCheck Tru Test Strips Pool Chlorine PH Bromine Alk 50ct
$9.25
Time Remaining: 29d 14h 19m
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DIGITAL TEST STRIP READER TRUTEST POOL SPA WATER KIT
DIGITAL TEST STRIP READER TRUTEST POOL SPA WATER KIT
$59.99
Time Remaining: 19d 22h 37m
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AquaChek TruTest Digital Hot Tub Spa Pool Test Strips
AquaChek TruTest Digital Hot Tub Spa Pool Test Strips
$8.95
Time Remaining: 8d 19h 40m
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AQUACHEK TRUTEST AQUACHECK TRU TEST DIGITAL CHLORINE
AQUACHEK TRUTEST AQUACHECK TRU TEST DIGITAL CHLORINE
$10.99
Time Remaining: 16d 23h 12m
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AquaChek TruTest Digital Test Strip Reader for Spa
AquaChek TruTest Digital Test Strip Reader for Spa
$45.95
Time Remaining: 11d 23h 9m
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AquaChek TruTest Test Strips Reader Refill 50ct AQCHECK STRIPS
AquaChek TruTest Test Strips Reader Refill 50ct AQCHECK STRIPS
$8.99
Time Remaining: 8d 20h 11m
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Union Labs Boxer Self Adhesive Vinyl Patch Kit 10
Union Labs Boxer Self Adhesive Vinyl Patch Kit 10
$18.50
Time Remaining: 16d 19h 37m
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Solaxx Aquatron Saltron Safe Dip Digital Chemistry Tester for Pools and Spas
Solaxx Aquatron Saltron Safe Dip Digital Chemistry Tester for Pools and Spas
$208.00
Time Remaining: 15d 21h 50m
Buy It Now for only: $208.00
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AquaChek Digital Pool Chemical Test Strip Reader
AquaChek Digital Pool Chemical Test Strip Reader
$55.99
Time Remaining: 8d 22h 39m
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Union Labs Boxer Vinyl Repair Kit 110 4oz 110
Union Labs Boxer Vinyl Repair Kit 110 4oz 110
$25.50
Time Remaining: 18d 17h 13m
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AquaChek TruTest Digital Swimming Pool Test Strips 50ct
AquaChek TruTest Digital Swimming Pool Test Strips 50ct
$12.00
Time Remaining: 1d 20h 41m
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 100 AquaChek Pool Spa Softub TruTest Test Strips
100 AquaChek Pool Spa Softub TruTest Test Strips
$15.16
Time Remaining: 21d 3h 32m
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Aqua Check Swimming Pool Test Kit Digital Strip Spa new
Aqua Check Swimming Pool Test Kit Digital Strip Spa new
$49.97
Time Remaining: 10d 22h 59m
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 50 AquaChek Pool Spa Softub TruTest Test Strips
50 AquaChek Pool Spa Softub TruTest Test Strips
$7.58
Time Remaining: 10d 7h 45m
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Union Labs Boxer Vinyl Adhesive 4 oz 104
Union Labs Boxer Vinyl Adhesive 4 oz 104
$21.50
Time Remaining: 16d 17h 54m
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AquaChek TruTest Digital Pool Spa Test Strip Reader
AquaChek TruTest Digital Pool Spa Test Strip Reader
$46.99
Time Remaining: 22d 19h 42m
Buy It Now for only: $46.99
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AquaChek TruTest Digital Spa Pool 50 Test Strips
AquaChek TruTest Digital Spa Pool 50 Test Strips
$9.99
Time Remaining: 2d 19h 37m
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Aqua Chek Aqua Chek Trutest Digital Rdr
Aqua Chek Aqua Chek Trutest Digital Rdr
$60.96
Time Remaining: 23d 6h 53m
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Aquachek TruTest Digital test strip reader + 25 strips
Aquachek TruTest Digital test strip reader + 25 strips
$74.99
Time Remaining: 25d 10h 24m
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AquaChek TruTest Test Strips 50 512082
AquaChek TruTest Test Strips 50 512082
$11.00
Time Remaining: 2d 15h 40m
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AquaChek TruTest Refill Strips 50ct
AquaChek TruTest Refill Strips 50ct
$9.25
Time Remaining: 22d 19h 42m
Buy It Now for only: $9.25
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AquaChek TruTest Digital Test Strip Reader for Pools
AquaChek TruTest Digital Test Strip Reader for Pools
$54.49
Time Remaining: 5d 2h 52m
Buy It Now for only: $54.49
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Aquachek TruTest AquaCheck Tru Test Strips Pool Chlorine PH Bromine Alk 100ct
Aquachek TruTest AquaCheck Tru Test Strips Pool Chlorine PH Bromine Alk 100ct
$16.99
Time Remaining: 4d 16m
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Aquachek TruTest Digital Test Strip Reader NIB
Aquachek TruTest Digital Test Strip Reader NIB
$44.95
Time Remaining: 2d 15h 59m
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Aquachek TruTest 50 digital test STRIPS REFILL bottle
Aquachek TruTest 50 digital test STRIPS REFILL bottle
$10.99
Time Remaining: 25d 10h 39m
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AquaChek TruTest Digital Test Strip Reader
AquaChek TruTest Digital Test Strip Reader
$48.99
Time Remaining: 19d 22h 29m
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50 AquaChek Pool Spa Hot Tub Softub TruTest Test Strips
50 AquaChek Pool Spa Hot Tub Softub TruTest Test Strips
$9.99
Time Remaining: 2d 19h 41m
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Union Labs Boxer 859 Vinyl Repair Kit 859
Union Labs Boxer 859 Vinyl Repair Kit 859
$19.50
Time Remaining: 16d 18h 23m
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NEW AquaChek Test Strips for Digital Reader 512082
NEW AquaChek Test Strips for Digital Reader 512082
$21.50
Time Remaining: 12d 16h 40m
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AQUACHEK TruTest DIGITAL POOL TEST STRIP READER
AQUACHEK TruTest DIGITAL POOL TEST STRIP READER
$49.99
Time Remaining: 12d 19h 44m
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TruTest Digital Strip Reader
TruTest Digital Strip Reader
$70.00
Time Remaining: 19d 21h 48m
Buy It Now for only: $70.00
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AquaChek Digital Test Strip Reader Aqua Check TruTest
AquaChek Digital Test Strip Reader Aqua Check TruTest
$73.95
Time Remaining: 10d 20h 43m
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Aquachek TruTest Digital Test Strip REFILLS FREE SHIP
Aquachek TruTest Digital Test Strip REFILLS FREE SHIP
$14.99
Time Remaining: 15d 14h 6m
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NEW Hayward MaxFlo II Pump 075 HP Max Rated SP2705X7
NEW Hayward MaxFlo II Pump 075 HP Max Rated SP2705X7
$375.50
Time Remaining: 23d 32m
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AquaChek Digital Test Strip Reader 2932400
AquaChek Digital Test Strip Reader 2932400
$62.50
Time Remaining: 16d 23h 14m
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Aqua Chek Aqua Chek Trutest Digital Rdr New Strips Test Products Testing Water
Aqua Chek Aqua Chek Trutest Digital Rdr New Strips Test Products Testing Water
$59.98
Time Remaining: 10d 1h 25m
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NEW Hayward MaxFlo II Pump 10 HP Max Rated SP2707X10
NEW Hayward MaxFlo II Pump 10 HP Max Rated SP2707X10
$398.50
Time Remaining: 23d 32m
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Aquachek TruTest Digital Test Reader FREE SHIP TO US
Aquachek TruTest Digital Test Reader FREE SHIP TO US
$49.00
Time Remaining: 15d 22h 30m
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NEW Goldline AquaTrol HP System Generator AQTROLHP
NEW Goldline AquaTrol HP System Generator AQTROLHP
$679.50
Time Remaining: 11d 16h 51m
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NEW Hayward AquaTrol Salt ChlorineGenerator AQUATROL RJ
NEW Hayward AquaTrol Salt ChlorineGenerator AQUATROL RJ
$540.50
Time Remaining: 12d 14m
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NEW Hayward Max Flo II Pump 20HP Max Rated SP2715X20
NEW Hayward Max Flo II Pump 20HP Max Rated SP2715X20
$489.50
Time Remaining: 23d 32m
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More Great Information on Strip Reader:

Motorola mobiles: Highly capable handsets which are also quite reliable by Retailsdirect

The handsets that have the brand name Motorola associated with them are quite good handsets in terms of features, reliability, and performance.

The different features present in this mobile phones like the camera, the music player, the connectivity technologies etc. differ in terms of their versions from mobile to mobile. However, they all share a common feature of being reliable.

Motorola, since the year 1928 when it was founded, has been on the path of innovation and creativity in all its product creation endeavours. Thus, in the year 1996 it bought out the Star TAC wearable phone which had a weight of only 3.1 ounces and was also the smallest phone at that time.

The year 1999 saw the launch of the iDEN i1000 plus handset which was the first handset to have all the following features in one single handset

The features of a digital phone
Two-way radio
An alphanumeric pager
The facility of E-mail
The facility of Fax
The facility of two way messaging
A micro browser for being able to use the features of the Internet.

That was the first definite step taken by Motorola in its endeavours showcasing wonderful handsets. Some of the fantastic handsets that have been recently released or are about to be released by Motorola include

Motorola W7 Active Edition
Motorola MC55
Motorola W388

These three examples are some of the most wonderful handsets that have ever been released. Motorola mobiles have been vested with three fantastic members in the form of these three handsets.

A quick peek into the feature of each of the three Motorola mobiles would be quite helpful in understanding these wonderful mobile devices and the overall knack of Motorola to be creative.

When one takes a look at the Motorola W7 Active edition then the following features are bound to catch one's attention

GPRS Class 12 (4+1/3+2/2+3/1+4 slots facility)
EDGE Class 12
Motion based games
Gesture control
Accelerometer sensor
Fitness applications
Pedometer
A camera having a fantastic resolution of 2 MP.
MotoID music recognition
Push-to-talk

An honest analysis of the mobile device known as the Motorola MC55 results in the noticing of the following features

A TFT resistive touchscreen
Wi-Fi 802.11 b/g
Bluetooth v2.0 with EDR
Intel PXA270 processor
Microsoft Windows Mobile 6.1 Professional
Assisted GPS
Shock resistant
Drop-to-concrete resistance
Snap-on magnetic strip reader
1D and 2D bar code scanners
A web browser capable of handling more than one web language.
A 2 MP camera

Motorola mobiles, especially the latest Motorola phones, therefore, have some of the most innovative and unique features that can be found in mobile phones today.

Another feature of the handsets that have been made by Motorola is that they are quite affordable due to having an economical price. Therefore, cheap Motorola mobiles are there with the number of features in them reflective of the overall innovative outlook of the parent company. The features of the two of the three handsets bear this innovative outlook.

Check out RetailsDirect website for other mobile phones like htc mobiles, Sony Ericsson mobiles, Motorola mobiles, etc.

Article Source: http://www.earticlesonline.com/Article/Motorola-mobiles--Highly-capable-handsets-which-are-also-quite-reliable/575315

Question about negative sign in EMF = - dΦ/dt...?

Him

I don't really understand why that negative sign is there. I was doing the following question, and if I leave the negative sign there, I get -450uT/ms, which is wrong...

Your ninth-grade nephew has asked you to come to his physical science class to explain how a credit card magnetic-strip reader works. You explain that as the strip is pulled past the reader's head, the magnetic field generates an emf in the reader's 2- diameter, 5000-turn coil. The induced voltage is 7.07 .

To impress the students with the small field involved, calculate the rate at which the field changes.

My problem isn't the question, I can do the question. I just don't understand why the negative in EMF = - dΦ/dt, result in the wrong answer. Why's the negative there in the first place?

Thanks.

In the equation EMF= -dΦ/dt,the negative sign is used to denote direction and not magnitude,i.e,According to lenz law,"An induced current is always in such a direction as to oppose the motion or change causing it".The negative sign in the equation represents the opposing direction.

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