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<h2 class="hd hd-2 unit-title">1.2.10. Video Lecture</h2>
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<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_8f1ef870736d41d8bcdcc3cd25ebcaa9">Downloads and transcripts</h3>
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<h4 class="hd hd-5">Transcripts</h4>
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<a class="btn btn-link" href="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@8f1ef870736d41d8bcdcc3cd25ebcaa9/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
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<h2 class="hd hd-2 unit-title">1.2.10. Required Assessment</h2>
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Assessment 1
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<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_0808b680ad3d461daebe0b684bcd06fb_2_1">
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<legend id="0808b680ad3d461daebe0b684bcd06fb_2_1-legend" class="response-fieldset-legend field-group-hd">Which of the following isotopes has the highest specific activity? Follow the lightboard example for your calculations</legend>
<p class="question-description" id="description_0808b680ad3d461daebe0b684bcd06fb_1_1"> Select only one option </p>
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<input type="radio" name="input_0808b680ad3d461daebe0b684bcd06fb_2_1" id="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="0808b680ad3d461daebe0b684bcd06fb_2_1-choice_1-label" for="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_0808b680ad3d461daebe0b684bcd06fb_2_1 description_0808b680ad3d461daebe0b684bcd06fb_1_1"> \(^{238}Pu\)
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<input type="radio" name="input_0808b680ad3d461daebe0b684bcd06fb_2_1" id="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="0808b680ad3d461daebe0b684bcd06fb_2_1-choice_2-label" for="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_0808b680ad3d461daebe0b684bcd06fb_2_1 description_0808b680ad3d461daebe0b684bcd06fb_1_1"> \(^{90}Sr\)
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<input type="radio" name="input_0808b680ad3d461daebe0b684bcd06fb_2_1" id="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="0808b680ad3d461daebe0b684bcd06fb_2_1-choice_3-label" for="input_0808b680ad3d461daebe0b684bcd06fb_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_0808b680ad3d461daebe0b684bcd06fb_2_1 description_0808b680ad3d461daebe0b684bcd06fb_1_1"> \(^{40}K\)
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