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Aqui vai a minha solução "rápida", não garanto a exactidão das
respostas, alguns são assuntos que não domino de todo e não tenho
muito tempo para ir confirmar.<br>
Em bastantes questões e tal como o Renato já tinha evidenciado em
relação à questão 13, considero pouco clara a questão ou mal
definida a começar logo pela primeira questão em que não é
mencionado qualquer ângulo de incidência do sinal na ionosfera e
este terá um factor decisivo na reflexão ou no escape do sinal para
o espaço. Diria que genéricamente, entre a frequencia crítica foF2 e
a MUF, para que o sinal seja reflectido terá de ter quanto maior a
frequência mais baixo o ângulo de incidência na ionosfera.<br>
Neste casos, tentei deduzir que solução devia pretender o inventor
da pergunta ...<br>
<br>
<table style="border-collapse: collapse;width:96pt" width="128"
border="0" cellpadding="0" cellspacing="0">
<colgroup><col style="width:48pt" span="2" width="64"> </colgroup><tbody>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt;width:48pt" width="64" height="20">Questão</td>
<td style="width:48pt" width="64">Proposta<br>
</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">1</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">2</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">3</td>
<td align="right">4</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">4</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">5</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">6</td>
<td>d</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">7</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">8</td>
<td>4?</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">9</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">10</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">11</td>
<td align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">12</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">13</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">14</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">15</td>
<td>c</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">16</td>
<td>a</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">17</td>
<td>a</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">18</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">19</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">20</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">21</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">22</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">23</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">24</td>
<td align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">25</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">26</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">27</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">28</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">29</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">30</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">31</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">32</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">33</td>
<td align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">34</td>
<td align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">35</td>
<td align="right">4</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">36</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">37</td>
<td align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">38</td>
<td align="right">4</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">39</td>
<td align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td style="height:15.0pt" align="right" height="20">40</td>
<td align="right">2</td>
</tr>
</tbody>
</table>
<br>
Aceitam-se e agradecem-se correcções em relação à solução que
proponho.<br>
O tempo agora anda muito apertado mas quando folgar (ou precisar de
me preparar para exame daqui a ano e meio) vou incluir as questões
na minha compilação e ir buscar fundamentação para as soluções.<br>
<br>
73!<br>
<br>
On 08-11-2011 14:16, João Gonçalves Costa wrote:
<blockquote
cite="mid:5C4C49AFB7040B42B32EB395C8F7887F3A6FE7DA45@EXH100.w2k.ctt.pt"
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<td style="width:216.6pt;padding:.75pt .75pt .75pt
.75pt;height:7.8pt" width="361">
<p class="MsoNormal" style="mso-line-height-alt:7.8pt"><b><span
style="font-size:15.0pt;font-family:"Arial","sans-serif";color:#F3CA09;mso-fareast-language:PT">Exames
da ANACOM</span></b><b><span
style="font-size:13.5pt;font-family:"Arial","sans-serif";color:#F3CA09;mso-fareast-language:PT">
</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT"><o:p></o:p></span></p>
</td>
<td style="width:11.4pt;padding:.75pt .75pt .75pt
.75pt;height:7.8pt" width="19"><br>
</td>
<td style="width:90.6pt;padding:.75pt .75pt .75pt
.75pt;height:7.8pt" width="151"><br>
</td>
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<p class="MsoNormal" style="margin-top:4.5pt"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT"><br>
O exame apresentado é o Exame de Amador de Radiocomunicações
para a categoria 1 que nos chegou através de um nosso
colega. Apenas está disponível neste momento as questões mas
em breve será colocada uma resolução com todos os
fundamentos teóricos. <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.5pt"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT">Agradecemos
a todos os colegas que tenham exames o favor de nos enviarem
para <a moz-do-not-send="true"
href="mailto:geral@radioamadores.net"><span
style="color:blue">geral@radioamadores.net</span></a> a
fim de efectuarmos a sua divulgação.<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.5pt"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT">Na
nossa secção de exames encontram-se também disponíveis
exames para as antigas categorias de radioamador.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.5pt"><b><span
style="font-family:"Arial","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="margin-top:4.5pt"><b><span
style="font-family:"Arial","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="margin-top:4.5pt"><b><span
style="font-family:"Arial","sans-serif"">Categoria
1</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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.75pt;height:13.8pt" width="12"><br>
</td>
<td style="width:.6pt;padding:.75pt .75pt .75pt
.75pt;height:13.8pt" width="1">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:PT"><img
id="Imagem_x0020_1"
src="cid:part1.07060907.06040206@gmail.com"
alt="Descrição:
http://www.radioamadores.net/logos/visto.gif"
width="19" border="0" height="18"></span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></p>
</td>
<td style="width:379.8pt;padding:.75pt .75pt .75pt
.75pt;height:13.8pt" width="633">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""><a
moz-do-not-send="true"
href="http://www.radioamadores.net/exames/categoria1ex1.pdf"
target="_blank">Exame de Amador de
Radiocomunicações</a>
(<a class="moz-txt-link-freetext" href="http://www.radioamadores.net/exames/categoria1ex1.pdf">http://www.radioamadores.net/exames/categoria1ex1.pdf</a>)<o:p></o:p></span></p>
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</td>
<td style="border:none" width="6"><br>
</td>
<td style="border:none" width="6"><br>
</td>
<td style="border:none" width="24"><br>
</td>
<td style="border:none" width="444"><br>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Fonte: <a moz-do-not-send="true"
href="http://www.radioamadores.net">http://www.radioamadores.net</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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