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<p><a href="/assets/courseware/v1/9c962cfb15d121fa2cd6f98f7bc43419/asset-v1:MITx+16.885x+3T2019+type@asset+block/Lecture_9___Bob_Ried___Aerothermodynamics.pdf" target="[object Object]">Lecture Slides</a></p>
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<h2 class="hd hd-2 unit-title">Aerothermodynamics: Part IV</h2>
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<h2 class="hd hd-2 unit-title">Aerothermodynamics: Part V</h2>
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Question 1
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<legend id="7d3ba41d7b94463390b2a21ba1acb55c_2_1-legend" class="response-fieldset-legend field-group-hd">Which of the following test facilities was most useful in testing the thermal properties of the Space Shuttle&#8217;s thermal protection tiles?</legend>
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<label class="problem-group-label" for="input_de023f3897144c76b146f145ec2bf9b6_2_1" id="label_de023f3897144c76b146f145ec2bf9b6_2_1">If a spacecraft goes into its reentry corridor at too <b><i>shallow</i></b> an angle...</label>
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<option value="The spacecraft will experience too high an acceleration and heating rate."> The spacecraft will experience too high an acceleration and heating rate.</option>
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<label class="problem-group-label" for="input_de023f3897144c76b146f145ec2bf9b6_3_1" id="label_de023f3897144c76b146f145ec2bf9b6_3_1">If a spacecraft goes into its reentry corridor at too <b><i>steep</i></b> an angle...</label>
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<legend id="0a4516417c83401499e803cce24aa290_2_1-legend" class="response-fieldset-legend field-group-hd">Surface catalysis is an important factor in the Space Shuttle&#8217;s thermal protection system because:</legend>
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<input type="radio" name="input_0a4516417c83401499e803cce24aa290_2_1" id="input_0a4516417c83401499e803cce24aa290_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="0a4516417c83401499e803cce24aa290_2_1-choice_0-label" for="input_0a4516417c83401499e803cce24aa290_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_0a4516417c83401499e803cce24aa290_2_1"> Recombination of atomic oxygen and nitrogen into diatomic molecules would contribute extra heat to the surface of the ceramic tiles.
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<input type="radio" name="input_0a4516417c83401499e803cce24aa290_2_1" id="input_0a4516417c83401499e803cce24aa290_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="0a4516417c83401499e803cce24aa290_2_1-choice_1-label" for="input_0a4516417c83401499e803cce24aa290_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_0a4516417c83401499e803cce24aa290_2_1"> Without catalysis, incoming hot plasma would chemically combine with the silica in the surface of the tiles, gradually eating away the tile.
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<input type="radio" name="input_0a4516417c83401499e803cce24aa290_2_1" id="input_0a4516417c83401499e803cce24aa290_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="0a4516417c83401499e803cce24aa290_2_1-choice_2-label" for="input_0a4516417c83401499e803cce24aa290_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_0a4516417c83401499e803cce24aa290_2_1"> Surface catalysis prevents the tiles from becoming unglued from the skin of the Space Shuttle.
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