Chapter 5

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How can the density of the Sun be measured?

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What is the definition of Absolute Zero?

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The temperature of an object is 273K. What is the temperature in degrees Celsius?

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The temperature of an object is 373K. What is the temperature in degrees Celsius?

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What is the temperature of an object from which no heat energy can be extracted?

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The surface temperature of the Sun is about 5800K. Based on this temperature, what is the expected peak wavelength of radiation?

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Which of the following measures the average speed of the particles (atoms or molecules) in a gas?

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A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars is the hottest?

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A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?

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The Sun emits its maximum intensity of light at about 520 nm. According to Wien’s Law, at what wavelength would the maximum intensity be for a star with a surface temperature twice that of the Sun?

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What is the sequence of star colours in order of increasing temperature?

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Is it possible for a red star to emit more energy than a blue star?

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The Stefan-Boltzmann law says that hot objects emit energy proportional to the fourth power of their temperature. One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface? (Please see appendix)

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What is the explanation for the pattern of granulation seen on the visible surface of the Sun?

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What is found in the centers of granules?

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What is responsible for binding the electrons to the nucleus?

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Which of the following is a set of rules that describes how atoms and subatomic particles behave?

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What is the lowest energy level in an atom called?

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The energy of the first level in an atom is 2.2×10-18 J, and the energy of the second energy level is 1.6×10-18 J. What is the energy of the photon that is emitted if an electron moves from the second level to the first?

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The diagram illustrates a light source, a gas cloud, and three different lines of sight (the observer is located at the numbered positions). Along which line of sight would an observer see an absorption spectrum

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Which of the following can be determined from the spectrum of a star, without additional information?

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Which of the following is a property of the Sun’s chromosphere?

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A boy has mass equal to 35 kg on the surface of the Earth? What is his weight on the surface of the sun?

Astronomy

How can the density of the Sun be measured?

What is the definition of Absolute Zero?

The temperature of an object is 273K. What is the temperature in degrees Celsius?

The temperature of an object is 373K. What is the temperature in degrees Celsius?

What is the temperature of an object from which no heat energy can be extracted?

The surface temperature of the Sun is about 5800K. Based on this temperature, what is the expected peak wavelength of radiation?

Which of the following measures the average speed of the particles (atoms or molecules) in a gas?

A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars is the hottest?

A plot of the continuous spectra of four different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?

The Sun emits its maximum intensity of light at about 520 nm. According to Wien’s Law, at what wavelength would the maximum intensity be for a star with a surface temperature twice that of the Sun?

What is the sequence of star colours in order of increasing temperature?

Is it possible for a red star to emit more energy than a blue star?

What is the explanation for the pattern of granulation seen on the visible surface of the Sun?

What is found in the centers of granules?

What is responsible for binding the electrons to the nucleus?

Which of the following is a set of rules that describes how atoms and subatomic particles behave?

What is the lowest energy level in an atom called?

The energy of the first level in an atom is 2.2×10-18 J, and the energy of the second energy level is 1.6×10-18 J. What is the energy of the photon that is emitted if an electron moves from the second level to the first?

The diagram illustrates a light source, a gas cloud, and three different lines of sight (the observer is located at the numbered positions). Along which line of sight would an observer see an absorption spectrum