Ipad 2 Technical Description Essay

Matt Anthes-Washburn demonstrates the use of the Go Wireless® pH and Vernier's Graphical Analysis app in an experiment investigating household acids and bases.

Today, I'd like to show you how to use Go Wireless pH to measure the pH of household acids and bases. This experiment is available as a free download from our website. You may be familiar with the method for measuring pH involving litmus paper. Well, there are several advantage to using a digital sensor to measure pH. Our pH sensors measure pH nearly instantly. They allow you to record your data and they provide for precise measurements for the pH. Go Wireless pH communicates with data collection software via Bluetooth smart. This low energy technology is easy to use and it yields great battery life. You can use Go Wireless pH with LabQuest 2 or with a device running graphical analysis.

Begin, by turning on your Go Wireless pH. The LED blinks red. Launch graphical analysis and tap to create a new experiment. Choose wireless sensors and find your Go Wireless pH in the list. Tap to connect to the sensor. You'll see that the LED now blinks green. Now, let's measure the pH of one of our household solutions. Remove the lid of the storage bottle. Then rinse the tip of the electrode with distilled water. Immerse the end of the sensor in this solution and you'll see that instantly, a live readout is presented with the pH of the solution. Wait for that value to stabilize and then you can record it. I'm going to make a note next to my value so I remember what I was measuring. This is baking soda and then I tap "Done", and you can see the recording and the note in the table.

Next, let's do another solution. I'm going to rinse the tip of the electrode again and now let's test ammonia. Once again, put the electrode in the solution and you can see the reading changes quickly. I'm going to wait for it to stabilize and when it does, I'm going to tap "Keep" into the data in the table. Type in the value or the values captured, I'm going to type in the name "Ammonia". Now you can see that the graphical analysis automatically saves all my recordings in the table. It saves the entire experiments so that I can go back to it at anytime. That's how easy it is to measure pH with Go Wireless pH and now I can finish my experiment.

Check out our website for details and instructions on this and other experiments.

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Models

Size and Weight1

Wi-Fi

  • Height: 9.50 inches (241.2 mm)
  • Width: 7.31 inches (185.7 mm)
  • Depth: 0.34 inch (8.8 mm)
  • Weight: 1.33 pounds (601 g)

Wi-Fi + 3G

  • Height: 9.50 inches (241.2 mm)
  • Width: 7.31 inches (185.7 mm)
  • Depth: 0.34 inch (8.8 mm)
  • Weight: 1.35 pounds (613 g)
    (Wi-Fi + 3G model)
  • Weight: 1.34 pounds (607 g)
    (Wi-Fi + 3G for Verizon model)

Storage2

Wireless and Cellular

Wi-Fi

  • Wi-Fi (802.11a/b/g/n)
  • Bluetooth 2.1 + EDR technology

Wi-Fi + 3G

  • Wi-Fi + 3G model: UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900 MHz)
  • Wi-Fi + 3G for Verizon model: CDMA EV-DO Rev. A (800, 1900 MHz)
  • Data only3
  • Wi-Fi (802.11a/b/g/n)
  • Bluetooth 2.1 + EDR technology

Carriers

Wi-Fi + 3G

Display

  • 9.7-inch (diagonal) LED-backlit glossy widescreen Multi-Touch display with IPS technology
  • 1024-by-768-pixel resolution at 132 pixels per inch (ppi)
  • Fingerprint-resistant oleophobic coating
  • Support for display of multiple languages and characters simultaneously

Chip

  • 1GHz dual-core Apple A5 custom-designed, high-performance, low-power system-on-a-chip

Cameras, Photos, and Video Recording

  • Back camera: Video recording, HD (720p) up to 30 frames per second with audio; still camera with 5x digital zoom
  • Front camera: Video recording, VGA up to 30 frames per second with audio; VGA-quality still camera
  • Tap to control exposure for video or stills
  • Photo and video geotagging over Wi-Fi

External Buttons and Connectors

Power and Battery4

Wi-Fi

  • Built-in 25-watt-hour rechargeable lithium-polymer battery
  • Up to 10 hours of surfing the web on Wi-Fi, watching video, or listening to music
  • Charging via power adapter or USB to computer system

Wi-Fi + 3G

  • Built-in 25-watt-hour rechargeable lithium-polymer battery
  • Up to 10 hours of surfing the web on Wi-Fi, watching video, or listening to music
  • Up to 9 hours of surfing the web using 3G data network
  • Charging via power adapter or USB to computer system

Input/Output

Wi-Fi

  • 30-pin dock connector port
  • 3.5-mm stereo headphone minijack
  • Built-in speaker
  • Microphone

Wi-Fi + 3G

  • 30-pin dock connector port
  • 3.5-mm stereo headphone minijack
  • Built-in speaker
  • Micro-SIM card tray (Wi-Fi + 3G model)
  • Microphone

Sensors

  • Accelerometer
  • Ambient light sensor
  • Gyroscope

Location

Wi-Fi

Wi-Fi + 3G

  • Wi-Fi
  • Digital compass
  • Assisted GPS
  • Cellular

Audio Playback

  • Frequency response: 20Hz to 20,000Hz
  • Audio formats supported: HE-AAC (V1 and V2), AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, and 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV
  • User-configurable maximum volume limit
  • Dolby Digital 5.1 surround sound pass-through with Apple Digital AV Adapter (sold separately)

TV and Video

  • AirPlay Mirroring to Apple TV support at 720p
  • Video mirroring and video out support: Up to 1080p with Apple Digital AV Adapter or Apple VGA Adapter (adapters sold separately)
  • Video out support at 576p and 480p with Apple Component AV Cable; 576i and 480i with Apple Composite AV Cable (cables sold separately)
  • Video formats supported: H.264 video up to 1080p, 30 frames per second, High Profile level 4.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG‑4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format

Mail Attachment Support

Viewable document types: .jpg, .tiff, .gif (images); .doc and .docx (Microsoft Word); .htm and .html (web pages); .key (Keynote); .numbers (Numbers); .pages (Pages); .pdf (Preview and Adobe Acrobat); .ppt and .pptx (Microsoft PowerPoint); .txt (text); .rtf (rich text format); .vcf (contact information); .xls and .xlsx (Microsoft Excel)

Languages

  • Language support for English (U.S.), English (UK), French (France), German, Traditional Chinese, Simplified Chinese, Dutch, Italian, Spanish, Portuguese (Brazil), Portuguese (Portugal), Danish, Swedish, Finnish, Norwegian, Korean, Japanese, Russian, Polish, Turkish, Ukrainian, Hungarian, Arabic, Thai, Czech, Greek, Hebrew, Indonesian, Malay, Romanian, Slovak, Croatian, Catalan, and Vietnamese
  • Keyboard support for English (U.S.), English (UK), French (France), French (Canadian), French (Switzerland), German, Traditional Chinese (Handwriting, Pinyin, Zhuyin, Cangjie, Wubihua), Simplified Chinese (Handwriting, Pinyin, Wubihua), Dutch, Italian, Spanish, Portuguese (Brazil), Portuguese (Portugal), Danish, Swedish, Finnish, Norwegian, Korean, Japanese (Romaji, Ten Key), Japanese (Kana), Russian, Polish, Turkish, Ukrainian, Estonian, Hungarian, Icelandic, Lithuanian, Latvian, Flemish, Arabic, Thai, Czech, Greek, Hebrew, Indonesian, Malay, Romanian, Slovak, Croatian, Bulgarian, Serbian (Cyrillic/Latin), Catalan, Vietnamese, Tibetan, Macedonian, and Cherokee
  • Dictionary support (enables predictive text and autocorrect) for English (U.S.), English (UK), French, German, Traditional Chinese, Simplified Chinese, Dutch, Italian, Spanish, Portuguese (Brazil), Portuguese (Portugal), Danish, Swedish, Finnish, Norwegian, Korean, Japanese (Romaji), Japanese (Kana), Russian, Polish, Turkish, Ukrainian, Hungarian, Lithuanian, Flemish, Arabic, Thai, Czech, Greek, Hebrew, Indonesian, Malaysian, Romanian, Slovak, Croatian, Catalan, Vietnamese, and Cherokee

Accessibility

  • VoiceOver screen reader
  • Support for playback of closed-captioned content
  • AssistiveTouch interface for adaptive accessories
  • Full-screen zoom magnification
  • Large fonts
  • White on black display
  • Left/right volume adjustment

Environmental Requirements

  • Operating ambient temperature: 32° to 95° F (0° to 35° C)
  • Nonoperating temperature: -4° to 113° F (-20° to 45° C)
  • Relative humidity: 5% to 95% noncondensing

System Requirements

  • Apple ID (required for some features)
  • Internet access5
  • Syncing with iTunes on a Mac or PC requires:
    • Mac: OS X v10.5.8 or later
    • PC: Windows 7; Windows Vista; or Windows XP Home or Professional with Service Pack 3 or later
    • iTunes 10.5 or later (free download from www.itunes.com/download)

In the Box

  • iPad
  • Dock Connector to USB Cable
  • 10W USB Power Adapter

Built-in Apps

  • Safari
  • Photos
  • App Store
  • Maps
  • Photo Booth
  • Reminders
  • Camera
  • Mail
  • FaceTime
  • iTunes
  • Music
  • Clock
  • Calendar
  • Messages
  • Newsstand
  • Videos
  • Game Center
  • Contacts
  • Notes

iPad and the Environment

Apple takes a complete product life cycle approach to determining our environmental impact.Learn more

iPad embodies Apple’s continuing environmental progress. It is designed with the following features to reduce environmental impact:

  • Mercury-free LCD display
  • Arsenic-free display glass
  • BFR-free
  • PVC-free
  • Recyclable aluminum enclosure

Apple and the Environment

Learn more about Apple’s dedication to reducing the environmental impact of our products and process. Apple Product Environmental Reports detail the environmental attributes of our products.

Recycling

Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your iPad.


  1. Actual size and weight vary by configuration and manufacturing process.
  2. 1GB = 1 billion bytes; actual formatted capacity less.
  3. 3G data plan is sold separately. The iPad with Wi‑Fi + 3G model you purchase is configured to work with a particular cellular network technology. Check with your carrier for compatibility and 3G data plan availability.
  4. Testing conducted by Apple in February 2012 using preproduction iPad units and software. Testing consisted of full battery discharge while performing each of the following tasks: video playback, audio playback, and Internet browsing using Wi‑Fi or cellular data network. Video content was a repeated 2-hour 23-minute movie purchased from the iTunes Store. Audio content was a playlist of 358 unique songs, consisting of a combination of songs imported from CDs using iTunes (128-Kbps AAC encoding) and songs purchased from the iTunes Store (256-Kbps AAC encoding). Internet over Wi‑Fi and cellular data network tests were conducted using dedicated web and mail servers, browsing snapshot versions of 20 popular web pages, and receiving mail once an hour. All settings were default except: Wi‑Fi was associated with a network (except for Internet browsing over cellular data network); the Wi‑Fi feature Ask to Join Networks and Auto-Brightness were turned off. Battery life depends on device settings, usage, and many other factors. Battery tests are conducted using specific iPad units; actual results may vary.
  5. Wireless broadband recommended; fees may apply.

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