A água que alimenta um reservatório, inicialmente vazio, escoa por uma tubulação de 2 m de comprimento e seção reta circular. Percebe-se que uma escala no reservatório registra um volume de 36 L após 30 min de operação. Nota´se também que a temperatura na entrada da tubulação é 25 °C e temperatura na saída é 57 °C. A água é aquecida por um dispositivo que fornece 16,8 kW para cada metro quadrado da superfície do tubo. Dessa forma, o diâmetro da tubulação, em mm, e a velocidade da água no interior do tubo, em cm/s, valem, respectivamente:

Dados:

!$ \bullet !$ !$ \pi !$/4 = 0,8;

!$ \bullet !$ massa específica da água: 1 kg/L; e

!$ \bullet !$ calor específico da água: 4200 J/ kg°C.

The U.S. Department of Homeland Security (DHS), which operates airport security checkpoints in the United States, is spending upward of US$ 7 million a year trying to develop technology that can detect the evil intent of the terrorists among us. Yes, you read that correctly: They plan to find the bad guys by reading their minds.

Dozens of researchers across the country are in the middle of a five year program contracted primarily to the Charles Stark Draper Laboratory, in Cambridge, Mass. They’ve developed a psycho-physiological theory of ‘malintent’ – basically, a hodgepodge of behaviorism and biometrics according to which physiological chances can give away a terrorist’s intention to do immediate harm. So far, they’ve spent US$ 20 million on biometric research, sensors, and a series of tests and demonstrations. This technology is called the Future Attribute Screening Technology (FAST).

The underlying theory is that your body reacts, in measurable and largely involuntary ways, to reveal the nature of your intentions. So as you wait in line at the airport checkpoint, thermal and other types of cameras and laser- and radar-based sensors will try to get a fix on the baseline parameters of your autonomic nervous system – your body temperature, your heart rate and respiration, your skin’s moistness, and the very look in your eyes. Then, as a security officer asks you a few questions, the sensors will remeasure those parameters so that the FAST algorithms can figure out whether you’re naughty or nice, all on the spot, without knowing anything else about you.

According to the text, your body temperature, your heart rate and respiration, your skin’s moistness, and the very look in your eyes …

The U.S. Department of Homeland Security (DHS), which operates airport security checkpoints in the United States, is spending upward of US$ 7 million a year trying to develop technology that can detect the evil intent of the terrorists among us. Yes, you read that correctly: They plan to find the bad guys by reading their minds.

Dozens of researchers across the country are in the middle of a five year program contracted primarily to the Charles Stark Draper Laboratory, in Cambridge, Mass. They’ve developed a psycho-physiological theory of ‘malintent’ – basically, a hodgepodge of behaviorism and biometrics according to which physiological chances can give away a terrorist’s intention to do immediate harm. So far, they’ve spent US$ 20 million on biometric research, sensors, and a series of tests and demonstrations. This technology is called the Future Attribute Screening Technology (FAST).

The underlying theory is that your body reacts, in measurable and largely involuntary ways, to reveal the nature of your intentions. So as you wait in line at the airport checkpoint, thermal and other types of cameras and laser- and radar-based sensors will try to get a fix on the baseline parameters of your autonomic nervous system – your body temperature, your heart rate and respiration, your skin’s moistness, and the very look in your eyes. Then, as a security officer asks you a few questions, the sensors will remeasure those parameters so that the FAST algorithms can figure out whether you’re naughty or nice, all on the spot, without knowing anything else about you.

What is true about the ideas mentioned in the text?

The U.S. Department of Homeland Security (DHS), which operates airport security checkpoints in the United States, is spending upward of US$ 7 million a year trying to develop technology that can detect the evil intent of the terrorists among us. Yes, you read that correctly: They plan to find the bad guys by reading their minds.

Dozens of researchers across the country are in the middle of a five year program contracted primarily to the Charles Stark Draper Laboratory, in Cambridge, Mass. They’ve developed a psycho-physiological theory of ‘malintent’ – basically, a hodgepodge of behaviorism and biometrics according to which physiological chances can give away a terrorist’s intention to do immediate harm. So far, they’ve spent US$ 20 million on biometric research, sensors, and a series of tests and demonstrations. This technology is called the Future Attribute Screening Technology (FAST).

The underlying theory is that your body reacts, in measurable and largely involuntary ways, to reveal the nature of your intentions. So as you wait in line at the airport checkpoint, thermal and other types of cameras and laser- and radar-based sensors will try to get a fix on the baseline parameters of your autonomic nervous system – your body temperature, your heart rate and respiration, your skin’s moistness, and the very look in your eyes. Then, as a security officer asks you a few questions, the sensors will remeasure those parameters so that the FAST algorithms can figure out whether you’re naughty or nice, all on the spot, without knowing anything else about you.

What expression could replace ‘malintent’ in the second paragraph still keeping the same meaning for the text?

The U.S. Department of Homeland Security (DHS), which operates airport security checkpoints in the United States, is spending upward of US$ 7 million a year trying to develop technology that can detect the evil intent of the terrorists among us. Yes, you read that correctly: They plan to find the bad guys by reading their minds.

Dozens of researchers across the country are in the middle of a five year program contracted primarily to the Charles Stark Draper Laboratory, in Cambridge, Mass. They’ve developed a psycho-physiological theory of ‘malintent’ – basically, a hodgepodge of behaviorism and biometrics according to which physiological chances can give away a terrorist’s intention to do immediate harm. So far, they’ve spent US$ 20 million on biometric research, sensors, and a series of tests and demonstrations. This technology is called the Future Attribute Screening Technology (FAST).

The underlying theory is that your body reacts, in measurable and largely involuntary ways, to reveal the nature of your intentions. So as you wait in line at the airport checkpoint, thermal and other types of cameras and laser- and radar-based sensors will try to get a fix on the baseline parameters of your autonomic nervous system – your body temperature, your heart rate and respiration, your skin’s moistness, and the very look in your eyes. Then, as a security officer asks you a few questions, the sensors will remeasure those parameters so that the FAST algorithms can figure out whether you’re naughty or nice, all on the spot, without knowing anything else about you.

Considering the central idea of the passage, which of the following suggested titles is suitable to the text?

As both an electrical engineer and a Jesuit priest, Lammert B. Otten can lead a spiritual retreat just as easily as a dam-building project in Zambia. “As an engineer,” he says, “you’re concreting with God to make life better for people.”

What task below could Lammert B. Otten be legally in charge of?

It’s a little surprising that the land of Sir Isaac Newton does not have its own space agency. An attempt to fill that void came with the announcement in June that the United Kingdom would create a ‘bureaucracy busting’ organization to oversee British civilian space and satellite activities.

What does the author of the passage refer to by the term “void”?

An old axiom says that in order to know where you are going, you first have to know where you are. To that, add that you should know which way you are facing. Makers of wireless handsets, proving the old axiom true, have already installed Global Positioning System (GPS) receivers, and are now poised to flood the market with phones containing tiny electronic compasses that allow the gadget to sense exactly what direction it’s facing.

What is known about the makers of wireless handsets?

An old axiom says that in order to know where you are going, you first have to know where you are. To that, add that you should know which way you are facing. Makers of wireless handsets, proving the old axiom true, have already installed Global Positioning System (GPS) receivers, and are now poised to flood the market with phones containing tiny electronic compasses that allow the gadget to sense exactly what direction it’s facing.

Complete the sentence according to the text: “ A (an) will let you know where you are, whereas to know which direction you are looking you need a (an) .

An old axiom says that in order to know where you are going, you first have to know where you are. To that, add that you should know which way you are facing. Makers of wireless handsets, proving the old axiom true, have already installed Global Positioning System (GPS) receivers, and are now poised to flood the market with phones containing tiny electronic compasses that allow the gadget to sense exactly what direction it’s facing.

What general idea underlies the paragraph?