A figura acima mostra uma janela do Word 2003, com parte de um documento em processo de edição. Com relação a essa janela e ao Word 2003, julgue o item.

Ao se clicar o botão , caracteres não-imprimíveis — como o caractere , mostrado no documento — deixarão de ser exibidos na tela.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

It takes time for a capacitor to release charge after being disconnected from a circuit.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

When servicing electronic equipment, instruction procedures seldom mention the fact that one should discharge capacitors.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

High-voltage capacitors are provided with terminals shorted so as to prevent possible risky voltages.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

In the expression “innocuous device”, the underlined word means completely harmless.

!$ \begin{cases}ax+2y+z=0 \\x+a^2y+3z=0\\2x+3y+5z=0 \end{cases} !$

Considerando o sistema homogêneo de equações lineares apresentado acima, em que a é uma constante real, julgue o item que se segue.

Para !$ a=-1 !$, a única solução do sistema é !$ x=y=z=0 !$.

Para os gregos — e mais tarde para os pensadores medievais — a ciência era uma especulação teórica, desligada da prática. A postura de desprezo pela técnica se devia ao fato de que, nessas civilizações, as atividades manuais eram ofício de escravos ou de servos, o que
significava uma desvalorização delas. Decorre daí que a ciência, como “saber contemplativo” — isto é, como pura teoria — se achava vinculada à reflexão filosófica. Filosofia é uma palavra de origem grega que significa “amor à sabedoria” e na Antiguidade representava um tipo de conhecimento superior e mais geral, alcançado pelo “sábio”, capaz de abranger o conhecimento da época, levando toda interrogação à busca das essências. Durante muitos séculos — toda a Antiguidade e a Idade Média —, não se fez distinção entre filosofia e ciência.

Dessa forma, pode-se dizer que qualquer cientista, em certo momento de seu trabalho, pode parar para refletir sobre questões propriamente filosóficas. O bom cientista, no sentido humano da palavra, deve ser aquele que também indaga sobre os fins a que se destinam suas pesquisas.

Samuel Murgel Branco. O saber científico e outros saberes. In: Márcia Kupstas (Org.). Ciência e tecnologia em debate. São Paulo: Moderna, p. 23-5 (com adaptações).

Com base no texto acima, julgue o item subsequente.

No primeiro parágrafo, a retirada do sinal indicativo da crase em “à reflexão” preservaria a correção gramatical e a coerência textual, apesar de alterar a relação semântica de “reflexão filosófica” com as demais ideias do texto.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

Capacitors have an attached discharge resistor to reduce gradually stored energy.

Capacitors may retain a charge long after power is removed from a circuit; this charge can cause shocks or damage to connected equipment. For example, even a seemingly innocuous device such as a disposable camera flash unit powered by a 1.5 volt AA battery contains a capacitor which may be charged to over 300 volts. This is easily capable of delivering a shock. Service procedures for electronic devices usually include instructions to discharge large or high-voltage capacitors. Capacitors may also have built-in discharge resistors to dissipate stored energy to a safe level within a few seconds after power is removed. High-voltage capacitors are stored with the terminals shorted, as protection from potentially dangerous voltages due to dielectric absorption.

Internet: <en.wikipedia.org> (adapted).

Based on the text above, judge the following item.

Capacitors can be a dangerous device.

ZYX/WXPP - 03/2008

São Paulo, 30 de novembro de 2008

Senhor Cristóvão Colombo,
Coordenador de Projetos Especiais.

Considerando o trecho inicial de um ofício apresentado acima, julgue o item que se segue.

O exemplo respeita as regras gramaticais da língua portuguesa para o registro culto da linguagem, atende aos padrões de identificação do documento, apresenta data e local da emissão de forma apropriada e faz uso correto de vocativo e de formas de tratamento compatíveis com o cargo do destinatário.