<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-has-score="False" data-runtime-version="1" data-course-id="course-v1:MITx+22.011x+3T2018" data-init="VerticalStudentView" data-request-token="c64fbe0403e111f099b202fa081815af" data-usage-id="block-v1:MITx+22.011x+3T2018+type@vertical+block@a97f053b66a14ee58b4f04b032a7257c" data-graded="True" data-runtime-class="LmsRuntime">
<h2 class="hd hd-2 unit-title">1.2.9. Video Lecture</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-has-score="False" data-runtime-version="1" data-course-id="course-v1:MITx+22.011x+3T2018" data-init="XBlockToXModuleShim" data-request-token="c64fbe0403e111f099b202fa081815af" data-usage-id="block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0" data-graded="True" data-runtime-class="LmsRuntime">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Video</h3>
<div
id="video_19f618cc67c841359d3036cde74f1ec0"
class="video closed"
data-metadata='{"saveStateEnabled": false, "autoplay": false, "publishCompletionUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/publish_completion", "start": 0.0, "prioritizeHls": false, "saveStateUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/xmodule_handler/save_user_state", "recordedYoutubeIsAvailable": true, "streams": "1.00:ElrW3hfUdsU", "autoAdvance": false, "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/transcript/available_translations", "captionDataDir": null, "ytMetadataEndpoint": "", "showCaptions": "true", "lmsRootURL": "https://openlearninglibrary.mit.edu", "transcriptTranslationUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/transcript/translation/__lang__", "ytApiUrl": "https://www.youtube.com/iframe_api", "transcriptLanguages": {"en": "English"}, "speed": null, "autohideHtml5": false, "generalSpeed": 1.0, "transcriptLanguage": "en", "savedVideoPosition": 0.0, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/b64fd59a89dd48c29338d551e7b4ad11.png?Signature=fucnDtUnqxfnURDN6yj6H7LKgrE%3D&AWSAccessKeyId=ASIA4QDFFSUR63OMKI3E&Expires=1742293169&x-amz-security-token=IQoJb3JpZ2luX2VjEAMaCXVzLWVhc3QtMSJGMEQCIAGQV911gPnMpNGPmViJ2bd4%2Blk0hCcsvxc90BbYMgQmAiAWFf29fRISfPJh2PpdxUnQ%2BSWCmbvfCnbJv0fB8P2PLyq6BQhbEAMaDDg1OTIwNTYzNzQxMSIMCtaVvR42Jf2mBOyKKpcFg%2BIYHBGJwpY3ECOxClf1ebI7BhCTz8C6BxNCE5BgkLSGYp%2FgaoGNyRKNJ%2B3S9ktZ%2FnZAL0ZikzgJtyzz1S7%2FFbDkpXvvL1MFX13T0tbKIA7VrGV5GX5lzzUv9IiKdbNucAyQp%2BEZXMubnafUVnuYKGIOOzPYceCe14vosDCn71bBijUifKxTQcRt3wRap85T%2FrDz9WstJRk%2F24Ixt97TTzcwFND5juEyFtcAaaf6oSAcyjRXNuiWHog9yy5ojjLJOKhMVfEw9FMq79CuWF0EXsrfeQFbT%2BiARuALilfMS9hIkBzVQ9uJNowmEjKUraFpF7snMfvtQ8Lpeh%2Fj3X8jvF03lejOMCYf7%2BgSVdo7BdU9pJsCK0Gci6QWxFiawDd3we02FbiyVAgEoTnZOnDJKzd1DGpigXUBtw%2FjJyFloDPdYU6DEzRhkggZdVFEx3YQSHprM%2B%2BH9nFDuQLjJK8ob5il21crhKGOb3siwxLoRk0ZxH9JTjdTpX0pLREyMyo4lFQn7VnhiceUgqcE4GBxMM9DiMoGYCI3%2BcZxMzoOuq5o1UN4k3qyaEjsGGLIRg7qHSpuzsk2v7DeE9AxXZ1lgplp6WeFiZnUcLmG%2FCW695WaRxQKDbxMP4tsw9km9pSkSh%2BItdbLth1QJ6PCAwj1Ne329X08p%2F8K70ER4FSnUyvrpKal3MIjokJT%2BhYrtaxQ0PHASsJgFULIYWyDqLVXfswf1MqQUUOhDkjhkpjElwhjGywVUEhQO7zKX%2FYeNthiFBGkBZuJXLqdeEaRq%2FbjiJneCxQ6EODXeMYJ%2BykvFAQXz19fwaBLSCy0UxINAz6QrU0djUuJODhaibvf6GW5cbm2H9kEs8%2FiyBBUuGyTSIwwR%2Bm8dyi1MImL5b4GOrIBk6L52LMV59L%2BVfmwB4LZyhMzWef9dSxteu1vdKI%2BHvt7wVGEKNnCbm4q0RxaIznUz0F9138YDZpxZbtlpcIKcSagaYwBTQi0rQnpiSBSiYA3EOVwdqvUXG1pd6guXnVCwh5OGdteAG6pFm2C4NNmXfISu4PgJI9EW2r9mPgF3A2RgGV9sahADEOCF3N5kC5gG8nOFNEcVJkwycWX7AfmeVZ4VmCDXfnI%2BLisRYGchiEkyA%3D%3D", "sources": ["https://d2f1egay8yehza.cloudfront.net/MITx22.011x-V004600_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MITx22.011x-V004600/MITx22.011x-V004600.m3u8"], "duration": 559.89, "end": 0.0, "completionEnabled": false, "completionPercentage": 0.95, "ytTestTimeout": 1500}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="19f618cc67c841359d3036cde74f1ec0"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_19f618cc67c841359d3036cde74f1ec0">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_19f618cc67c841359d3036cde74f1ec0">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@19f618cc67c841359d3036cde74f1ec0/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-has-score="False" data-runtime-version="1" data-course-id="course-v1:MITx+22.011x+3T2018" data-init="VerticalStudentView" data-request-token="c64fbe0403e111f099b202fa081815af" data-usage-id="block-v1:MITx+22.011x+3T2018+type@vertical+block@59095ac321d24796b4509783a6087be4" data-graded="True" data-runtime-class="LmsRuntime">
<h2 class="hd hd-2 unit-title">1.2.9. Required Assessment</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-has-score="True" data-runtime-version="1" data-course-id="course-v1:MITx+22.011x+3T2018" data-init="XBlockToXModuleShim" data-request-token="c64fbe0403e111f099b202fa081815af" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a" data-graded="True" data-runtime-class="LmsRuntime">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_48c5a67cb31840fb86b309133a9fd04a" class="problems-wrapper" role="group"
aria-labelledby="48c5a67cb31840fb86b309133a9fd04a-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="2"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="48c5a67cb31840fb86b309133a9fd04a-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a-problem-progress" tabindex="-1">
Assessment 1
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@48c5a67cb31840fb86b309133a9fd04a-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="formulaequationinput_48c5a67cb31840fb86b309133a9fd04a_2_1" class="inputtype formulaequationinput">
<div class="unanswered">
<label class="problem-group-label" for="input_48c5a67cb31840fb86b309133a9fd04a_2_1" id="label_48c5a67cb31840fb86b309133a9fd04a_2_1">What is the radioactivity in Becquerels (Bq) of \(10^{28}\) atoms of \(^{238}Pu\)? Indicate the answer in terms of mantissa \((M)\) and exponent \((E)\) of the expression \(M \times 10^{E}\). Give your answer with just two significant digits, both for the mantissa (first box) and the exponent (second box)</label>
<input type="text" name="input_48c5a67cb31840fb86b309133a9fd04a_2_1" id="input_48c5a67cb31840fb86b309133a9fd04a_2_1" data-input-id="48c5a67cb31840fb86b309133a9fd04a_2_1" value="" aria-describedby="status_48c5a67cb31840fb86b309133a9fd04a_2_1" size="20"/>
<span class="trailing_text" id="trailing_text_48c5a67cb31840fb86b309133a9fd04a_2_1"/>
<span class="status unanswered" id="status_48c5a67cb31840fb86b309133a9fd04a_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_48c5a67cb31840fb86b309133a9fd04a_2_1" class="answer"/>
<div id="input_48c5a67cb31840fb86b309133a9fd04a_2_1_preview" class="equation">
\(\)
<img src="/static/images/spinner.bc34f953403f.gif" class="loading" alt="Loading"/>
</div>
</div>
<div class="script_placeholder" data-src="/static/js/capa/src/formula_equation_preview.b1967ab28c31.js"/>
</div></div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 2" role="group"><div id="formulaequationinput_48c5a67cb31840fb86b309133a9fd04a_3_1" class="inputtype formulaequationinput">
<div class="unanswered">
<input type="text" name="input_48c5a67cb31840fb86b309133a9fd04a_3_1" id="input_48c5a67cb31840fb86b309133a9fd04a_3_1" data-input-id="48c5a67cb31840fb86b309133a9fd04a_3_1" value="" aria-describedby="status_48c5a67cb31840fb86b309133a9fd04a_3_1" size="20"/>
<span class="trailing_text" id="trailing_text_48c5a67cb31840fb86b309133a9fd04a_3_1"/>
<span class="status unanswered" id="status_48c5a67cb31840fb86b309133a9fd04a_3_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_48c5a67cb31840fb86b309133a9fd04a_3_1" class="answer"/>
<div id="input_48c5a67cb31840fb86b309133a9fd04a_3_1_preview" class="equation">
\(\)
<img src="/static/images/spinner.bc34f953403f.gif" class="loading" alt="Loading"/>
</div>
</div>
<div class="script_placeholder" data-src="/static/js/capa/src/formula_equation_preview.b1967ab28c31.js"/>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 1" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_48c5a67cb31840fb86b309133a9fd04a" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_48c5a67cb31840fb86b309133a9fd04a">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="48c5a67cb31840fb86b309133a9fd04a-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="48c5a67cb31840fb86b309133a9fd04a-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="48c5a67cb31840fb86b309133a9fd04a-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="True">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
<div class="vert vert-1" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-has-score="True" data-runtime-version="1" data-course-id="course-v1:MITx+22.011x+3T2018" data-init="XBlockToXModuleShim" data-request-token="c64fbe0403e111f099b202fa081815af" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667" data-graded="True" data-runtime-class="LmsRuntime">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_86a32e6507bb4571b3629d6a9a387667" class="problems-wrapper" role="group"
aria-labelledby="86a32e6507bb4571b3629d6a9a387667-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="2"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="86a32e6507bb4571b3629d6a9a387667-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667-problem-progress" tabindex="-1">
Assessment 2
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@86a32e6507bb4571b3629d6a9a387667-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="formulaequationinput_86a32e6507bb4571b3629d6a9a387667_2_1" class="inputtype formulaequationinput">
<div class="unanswered">
<label class="problem-group-label" for="input_86a32e6507bb4571b3629d6a9a387667_2_1" id="label_86a32e6507bb4571b3629d6a9a387667_2_1">What will be the activity of that same amount of \(^{238}Pu\) in 100 years? Indicate the answer in terms of mantissa \((M)\) and exponent \((E)\) of the expression \(M \times 10^{E}\). Give your answer with just two significant digits, both for the mantissa (first box) and the exponent (second box)</label>
<input type="text" name="input_86a32e6507bb4571b3629d6a9a387667_2_1" id="input_86a32e6507bb4571b3629d6a9a387667_2_1" data-input-id="86a32e6507bb4571b3629d6a9a387667_2_1" value="" aria-describedby="status_86a32e6507bb4571b3629d6a9a387667_2_1" size="20"/>
<span class="trailing_text" id="trailing_text_86a32e6507bb4571b3629d6a9a387667_2_1"/>
<span class="status unanswered" id="status_86a32e6507bb4571b3629d6a9a387667_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_86a32e6507bb4571b3629d6a9a387667_2_1" class="answer"/>
<div id="input_86a32e6507bb4571b3629d6a9a387667_2_1_preview" class="equation">
\(\)
<img src="/static/images/spinner.bc34f953403f.gif" class="loading" alt="Loading"/>
</div>
</div>
<div class="script_placeholder" data-src="/static/js/capa/src/formula_equation_preview.b1967ab28c31.js"/>
</div></div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 2" role="group"><div id="formulaequationinput_86a32e6507bb4571b3629d6a9a387667_3_1" class="inputtype formulaequationinput">
<div class="unanswered">
<input type="text" name="input_86a32e6507bb4571b3629d6a9a387667_3_1" id="input_86a32e6507bb4571b3629d6a9a387667_3_1" data-input-id="86a32e6507bb4571b3629d6a9a387667_3_1" value="" aria-describedby="status_86a32e6507bb4571b3629d6a9a387667_3_1" size="20"/>
<span class="trailing_text" id="trailing_text_86a32e6507bb4571b3629d6a9a387667_3_1"/>
<span class="status unanswered" id="status_86a32e6507bb4571b3629d6a9a387667_3_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_86a32e6507bb4571b3629d6a9a387667_3_1" class="answer"/>
<div id="input_86a32e6507bb4571b3629d6a9a387667_3_1_preview" class="equation">
\(\)
<img src="/static/images/spinner.bc34f953403f.gif" class="loading" alt="Loading"/>
</div>
</div>
<div class="script_placeholder" data-src="/static/js/capa/src/formula_equation_preview.b1967ab28c31.js"/>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 2" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_86a32e6507bb4571b3629d6a9a387667" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_86a32e6507bb4571b3629d6a9a387667">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="86a32e6507bb4571b3629d6a9a387667-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="86a32e6507bb4571b3629d6a9a387667-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="86a32e6507bb4571b3629d6a9a387667-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="True">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
© All Rights Reserved