Exam 16: The Evolution of the Universe

Assuming the Hubble constant is equal to 72 km/s/Mpc,estimate the age of the universe (or Hubble time).Note that 1 Mpc = 3.1 × 10¹⁹ km,and 1 year = 3.17 × 10⁷ seconds.

(Essay)

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Question 21

A grand unified theory unites which forces?

(Multiple Choice)

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Question 22

The COBE and WMAP satellites detected fluctuations in the cosmic microwave background radiation.On average,how big were these fluctuations,and what does that tell us about the very early universe?

(Essay)

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Question 23

In the early 1960s,physicists named Penzias and Wilson detected a persistent noise at a wavelength of 1 mm in their radio telescope.The persistent noise that Penzias and Wilson detected came from all directions in the sky due to:

(Multiple Choice)

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Question 24

About what was the temperature of the universe when a typical cosmic microwave background radiation photon was no longer able spontaneously to create an electron and positron pair?

(Multiple Choice)

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Question 25

Which of the following was NOT created in the early universe as a result of the Big Bang?

(Multiple Choice)

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Question 26

After the Big Bang,as the universe cooled and protons and electrons combined so that the universe became neutral,what important consequence happened?

(Multiple Choice)

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Question 27

Was the Big Bang an explosion that flung debris throughout space?

(Multiple Choice)

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Question 28

How does the addition of a nonzero cosmological constant affect the expansion of the universe?

(Multiple Choice)

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Question 29

At what stage in the universe's history do we think the asymmetry between matter and antimatter was created?

(Multiple Choice)

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Question 30

Why does the expansion of space cause redshifts of distant galaxies?

(Multiple Choice)

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Question 31

Why is the fact that the cosmic microwave background radiation is very smooth considered a problem?

(Multiple Choice)

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Question 32

What will happen to the expansion of the universe in the future if (a)W > 1,(b)W = 1,and (c) W < 1?

(Essay)

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Question 33

In some particle physics theories,the universe must have more than three spatial dimensions,but we experience only three.Why would we not see the other spatial dimensions?

(Multiple Choice)

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Question 34

Soon after the Big Bang,we believe the four fundamental forces of nature were united into one superforce,and ________ was the first to split off from the others.

(Multiple Choice)

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Question 35

In the 1990s,astronomers found that distant Type Ia supernovae were than they expected,leading them to conclude that .

(Multiple Choice)

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Question 36

Observations of Type Ia supernovae in distant galaxies have shown that:

(Multiple Choice)

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Question 37

What can solve the flatness and horizon problem in cosmology,and why?

(Essay)

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Question 38

The existence of the cosmic microwave background radiation tells us that the early universe was:

(Multiple Choice)

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Question 39

Whether or not parallel universes exist is hard to determine because:

(Multiple Choice)

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Question 40

Showing 21 - 40 of 55

Assuming the Hubble constant is equal to 72 km/s/Mpc,estimate the age of the universe (or Hubble time).Note that 1 Mpc = 3.1 × 10¹⁹ km,and 1 year = 3.17 × 10⁷ seconds.

A grand unified theory unites which forces?

The COBE and WMAP satellites detected fluctuations in the cosmic microwave background radiation.On average,how big were these fluctuations,and what does that tell us about the very early universe?

In the early 1960s,physicists named Penzias and Wilson detected a persistent noise at a wavelength of 1 mm in their radio telescope.The persistent noise that Penzias and Wilson detected came from all directions in the sky due to:

About what was the temperature of the universe when a typical cosmic microwave background radiation photon was no longer able spontaneously to create an electron and positron pair?

Which of the following was NOT created in the early universe as a result of the Big Bang?

After the Big Bang,as the universe cooled and protons and electrons combined so that the universe became neutral,what important consequence happened?

Was the Big Bang an explosion that flung debris throughout space?

How does the addition of a nonzero cosmological constant affect the expansion of the universe?

At what stage in the universe's history do we think the asymmetry between matter and antimatter was created?

Why does the expansion of space cause redshifts of distant galaxies?

Why is the fact that the cosmic microwave background radiation is very smooth considered a problem?

What will happen to the expansion of the universe in the future if (a)W > 1,(b)W = 1,and (c) W < 1?

In some particle physics theories,the universe must have more than three spatial dimensions,but we experience only three.Why would we not see the other spatial dimensions?

Soon after the Big Bang,we believe the four fundamental forces of nature were united into one superforce,and ________ was the first to split off from the others.

In the 1990s,astronomers found that distant Type Ia supernovae were than they expected,leading them to conclude that .

Observations of Type Ia supernovae in distant galaxies have shown that:

What can solve the flatness and horizon problem in cosmology,and why?

The existence of the cosmic microwave background radiation tells us that the early universe was:

Whether or not parallel universes exist is hard to determine because:

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

Formation of Structure

Life in the Universe

Filters

Exam 16: The Evolution of the Universe

Assuming the Hubble constant is equal to 72 km/s/Mpc,estimate the age of the universe (or Hubble time).Note that 1 Mpc = 3.1 × 10¹⁹ km,and 1 year = 3.17 × 10⁷ seconds.

A grand unified theory unites which forces?

The COBE and WMAP satellites detected fluctuations in the cosmic microwave background radiation.On average,how big were these fluctuations,and what does that tell us about the very early universe?

In the early 1960s,physicists named Penzias and Wilson detected a persistent noise at a wavelength of 1 mm in their radio telescope.The persistent noise that Penzias and Wilson detected came from all directions in the sky due to:

About what was the temperature of the universe when a typical cosmic microwave background radiation photon was no longer able spontaneously to create an electron and positron pair?

Which of the following was NOT created in the early universe as a result of the Big Bang?

After the Big Bang,as the universe cooled and protons and electrons combined so that the universe became neutral,what important consequence happened?

Was the Big Bang an explosion that flung debris throughout space?

How does the addition of a nonzero cosmological constant affect the expansion of the universe?

At what stage in the universe's history do we think the asymmetry between matter and antimatter was created?

Why does the expansion of space cause redshifts of distant galaxies?

Why is the fact that the cosmic microwave background radiation is very smooth considered a problem?

What will happen to the expansion of the universe in the future if (a)W > 1,(b)W = 1,and (c) W < 1?

In some particle physics theories,the universe must have more than three spatial dimensions,but we experience only three.Why would we not see the other spatial dimensions?

Soon after the Big Bang,we believe the four fundamental forces of nature were united into one superforce,and ________ was the first to split off from the others.

In the 1990s,astronomers found that distant Type Ia supernovae were ________ than they expected,leading them to conclude that ________.

Observations of Type Ia supernovae in distant galaxies have shown that:

What can solve the flatness and horizon problem in cosmology,and why?

The existence of the cosmic microwave background radiation tells us that the early universe was:

Whether or not parallel universes exist is hard to determine because:

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

Formation of Structure

Life in the Universe

Filters

In the 1990s,astronomers found that distant Type Ia supernovae were than they expected,leading them to conclude that .