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<h2 class="hd hd-2 unit-title">Lecture Files & Content</h2>
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<p><a href="/assets/courseware/v1/d96dbaef34dbaedfa27445e786788b5c/asset-v1:MITx+16.885x+3T2019+type@asset+block/Lecture_21_-_Shiela_Widnall_-_Columbia_Accident.pdf" target="[object Object]">Lecture Slides</a></p>
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<h2 class="hd hd-2 unit-title">Columbia Accident: Part I</h2>
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<h2 class="hd hd-2 unit-title">Columbia Accident: Part II</h2>
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<a class="btn btn-link" href="/courses/course-v1:MITx+16.885x+3T2019/xblock/block-v1:MITx+16.885x+3T2019+type@video+block@5e1d6af2a380404dbf1b25e1290b0a2e/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
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<a class="btn btn-link" href="/courses/course-v1:MITx+16.885x+3T2019/xblock/block-v1:MITx+16.885x+3T2019+type@video+block@5e1d6af2a380404dbf1b25e1290b0a2e/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
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<h2 class="hd hd-2 unit-title">Columbia Accident: Part III</h2>
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<h2 class="hd hd-2 unit-title">Columbia Accident: Part IV</h2>
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<h2 class="hd hd-2 unit-title">Questions</h2>
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Question 1
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<legend id="b9668d4c71c24645aa00b0d1d3858003_2_1-legend" class="response-fieldset-legend field-group-hd">As the Space Shuttle reenters the Earth&#8217;s atmosphere, the most important process by which the atmosphere absorbs energy is:</legend>
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<input type="radio" name="input_b9668d4c71c24645aa00b0d1d3858003_2_1" id="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="b9668d4c71c24645aa00b0d1d3858003_2_1-choice_0-label" for="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_b9668d4c71c24645aa00b0d1d3858003_2_1"> Ionization of oxygen and nitrogen
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<input type="radio" name="input_b9668d4c71c24645aa00b0d1d3858003_2_1" id="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="b9668d4c71c24645aa00b0d1d3858003_2_1-choice_1-label" for="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_b9668d4c71c24645aa00b0d1d3858003_2_1"> Chemical reaction combining oxygen and nitrogen into NOX molecules
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<input type="radio" name="input_b9668d4c71c24645aa00b0d1d3858003_2_1" id="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="b9668d4c71c24645aa00b0d1d3858003_2_1-choice_2-label" for="input_b9668d4c71c24645aa00b0d1d3858003_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_b9668d4c71c24645aa00b0d1d3858003_2_1"> Dissociation of oxygen and nitrogen molecules into atoms
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Question 2
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<legend id="bc251a5f6bb646828ced29e964f3a827_2_1-legend" class="response-fieldset-legend field-group-hd">The temperature of the gas right in front of the wing leading edge during the hottest phase of reentry is:</legend>
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<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><p>The maximum temperature that the carbon-carbon material on the Space Shuttle&#8217;s nose cap and wing leading edges can withstand is significantly lower than the temperature of the superheated atmospheric gas during reentry</p>
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Question 4
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<legend id="f64ab3901a2c4a52973adf29c4291bae_2_1-legend" class="response-fieldset-legend field-group-hd">The Columbia Accident Investigation Board (CAIB) pointed out several similarities between the Columbia and the Challenger disasters. Which of the following are similarities which contributed to both accidents?</legend>
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