{
  "title": "Digital Micrometer: Read, Measure & Fix Zero Error | 3 Modes",
  "alternate_titles": [
    "Can You Trust Your Micrometer? Fix Positive & Negative Zero Error",
    "Digital Micrometer Interactive: Student & Teacher Tutorial"
  ],
  "description": "Can you explain a micrometer reading instead of just copying its display?\nExplore, Practice and Challenge: a hands-on guide for students and teachers.\n\nTry the interactive:\nhttps://iwant2study.moe.edu.sg/lookangejss/01_measurement/ejss_model_DigitalMicrometer/index.html\n\nLearn how to:\n- Resize the green object and bring the spindle into contact.\n- Add the sleeve and thimble readings to the nearest 0.01 mm.\n- Use guided hints, typed answers and the mobile-friendly answer list.\n- Correct positive and negative zero error using observed reading minus zero error.\n- Learn from feedback and start a fresh randomized Challenge.\n\nWorked examples:\n7.50 + 0.16 = 7.66 mm\nPositive zero error: 7.76 - (+0.10) = 7.66 mm\nNegative zero error: 7.56 - (-0.10) = 7.66 mm\nRead the sleeve and thimble scales for the observed reading, then subtract the signed zero error to obtain the corrected width. The list/text switch is manual on either device.\n\nTeacher prompt:\nModel one example in Explore, ask pairs to explain each step in Practice, then use Challenge as an independent check. Keep the same object and compare positive and negative zero errors. Why should its corrected width stay constant?\n\nChapters:\n00:00 Can you trust the display?\n00:11 Explore: resize and measure\n01:26 Practice: hints and answers\n02:09 Mobile list and desktop text\n02:38 Positive zero error\n03:32 Negative zero error\n04:10 Challenge: attempt, reflect, repeat\n04:57 Your classroom challenge\n\nCredits:\nSimulation: Fu-Kwun Hwang, Wee Loo Kang (lookang), Wolfgang Christian.\nOpen Source Physics / Easy JavaScript Simulations / WebEJS / iwant2study.\nThe simulation identifies its license as Creative Commons Attribution-NonCommercial-ShareAlike 4.0.\nTutorial recorded from the linked live interactive; English narration generated with local Kokoro (af_bella).\n\n#Micrometer #Physics #OpenSourcePhysics",
  "tags": [
    "digital micrometer",
    "micrometer screw gauge",
    "zero error",
    "positive zero error",
    "negative zero error",
    "sleeve scale",
    "thimble scale",
    "physics measurement",
    "interactive simulation",
    "WebEJS",
    "iwant2study",
    "Open Source Physics"
  ],
  "hashtags": [
    "#Micrometer",
    "#Physics",
    "#OpenSourcePhysics"
  ],
  "chapters": [
    {
      "time": "00:00",
      "title": "Can you trust the display?"
    },
    {
      "time": "00:11",
      "title": "Explore: resize and measure"
    },
    {
      "time": "01:26",
      "title": "Practice: hints and answers"
    },
    {
      "time": "02:09",
      "title": "Mobile list and desktop text"
    },
    {
      "time": "02:38",
      "title": "Positive zero error"
    },
    {
      "time": "03:32",
      "title": "Negative zero error"
    },
    {
      "time": "04:10",
      "title": "Challenge: attempt, reflect, repeat"
    },
    {
      "time": "04:57",
      "title": "Your classroom challenge"
    }
  ],
  "thumbnail": {
    "path": "thumbnail_1280x720.jpg",
    "status": "ready",
    "brief": "Actual interactive with bold honest question: CAN YOU TRUST IT? No artificial face."
  },
  "pinned_comment": "Try it here: https://iwant2study.moe.edu.sg/lookangejss/01_measurement/ejss_model_DigitalMicrometer/index.html\nKeep the same object. Change zero error from +0.10 mm to -0.10 mm. Explain why the corrected width stays the same.",
  "category": "Education",
  "playlist_suggestion": "Physics Simulations: Measurement",
  "audience_setting": "Channel owner to select the appropriate audience setting before uploading. Intended for secondary physics students and teachers.",
  "language": "English",
  "captions_path": "captions.srt",
  "visibility_recommendation": "Unlisted for initial review; public when ready.",
  "license_note": "Simulation declares CC BY-NC-SA 4.0. Preserve attribution and applicable license conditions.",
  "verification": {
    "mp4_ready": true,
    "audio_ready": true,
    "captions_ready": true,
    "thumbnail_ready": true,
    "metadata_ready": true,
    "published_to_youtube": false
  }
}