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<h2 class="hd hd-2 unit-title">1.1.2. Video Lecture</h2>
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<p>In the following video we'll learn that some smoke detectors contain little radioactive sources of Americium. Please do <strong>not</strong> try to remove them from your smoke detectors!</p>
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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@d0d69d2b52204014903cd401c3f47438/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
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<h2 class="hd hd-2 unit-title">1.1.2. Required Assessment</h2>
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Assessment 1
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<legend id="bba46d92794c49bfbd3909837998e6c6_2_1-legend" class="response-fieldset-legend field-group-hd">Which of the following types of radiation would be blocked by a piece of paper?</legend>
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Assessment 2
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Assessment 3
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<legend id="3022fc48ca9642d6ba55a4f9b6140a41_2_1-legend" class="response-fieldset-legend field-group-hd">Which of the following types of radiation would be blocked by a thick, lead brick?</legend>
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Assessment 4
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<legend id="da4a6f6c50294086b210c68d48180149_2_1-legend" class="response-fieldset-legend field-group-hd">Why did Firestone apply Polonium to their spark plugs in the 1940&#8217;s?</legend>
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