Choose the best answer to each of the following. Explain your reasoning. Which of these galaxies is likely to be oldest? (a) a galaxy in the Local Group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 12, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of these galaxies is likely to be oldest? (a) a galaxy in the Local Group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

You are standing a distance x = 1.75 m away from this mirror. The object you are looking at is y = 0.29 m from the mirror. The angle of incidence is θ = 30°. What is the exact distance from you to the image?

For each of the actions depicted below, a magnet and/or metal loop moves with velocity v→ (v→ is constant and has the same magnitude in all parts). Determine whether a current is induced in the metal loop. If so, indicate the direction of the current in the loop, either clockwise or counterclockwise when seen from the right of the loop. The axis of the magnet is lined up with the center of the loop. For the action depicted in (Figure 5), indicate the direction of the induced current in the loop (clockwise, counterclockwise or zero, when seen from the right of the loop). I know that the current is clockwise, I just dont understand why. Please fully explain why it's clockwise, Thank you

A planar double pendulum consists of two point masses \[m_1 = 1.00~\mathrm{kg}, \qquad m_2 = 1.00~\mathrm{kg}\]connected by massless, rigid rods of lengths \[L_1 = 1.00~\mathrm{m}, \qquad L_2 = 1.20~\mathrm{m}.\]The upper rod is hinged to a fixed pivot; gravity acts vertically downward with\[g = 9.81~\mathrm{m\,s^{-2}}.\]Define the generalized coordinates \(\theta_1,\theta_2\) as the angles each rod makes with thedownward vertical (positive anticlockwise, measured in radians unless stated otherwise).At \(t=0\) the system is released from rest with \[\theta_1(0)=120^{\circ}, \qquad\theta_2(0)=-10^{\circ}, \qquad\dot{\theta}_1(0)=\dot{\theta}_2(0)=0 .\]Using the exact nonlinear equations of motion (no small-angle or planar-pendulumapproximations) and assuming the rods never stretch or slip, determine the angle\(\theta_2\) at the instant\[t = 10.0~\mathrm{s}.\]Give the result in degrees, in the interval \((-180^{\circ},180^{\circ}]\).

Answer 2

Textbook Question

Chapter 12, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of these galaxies is likely to be oldest? (a) a galaxy in the Local Group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 12, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of these galaxies is likely to be oldest? (a) a galaxy in the Local Group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 12, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of these galaxies is likely to be oldest? (a) a galaxy in the Local Group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Answer 8

Expert Solution & Answer

To determine

The oldest galaxy among the given options.

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

The oldest galaxy among the given options.

Answer 12

Answer to Problem 1QQ

A galaxy observed at a distance of 10 billion light years will be oldest.

Answer 13

Explanation of Solution

Introduction:

Light-year is the unit for measuring astronomical distance. It is defined as the distance travelled by the light in one year. It is used to measure the distance between two stars or planet.

1 light year =3×108×365×24×36001 light year = 9.46×1015 m

Option c is: A galaxy observed at a distance of 10 billion light years.

1 light year = 3×108×365×24×360010×109 light year = 1×109×9.46×1015 m1010 light year = 9.46×1025m

This means that the light started travelling from these galaxies 10 billion light years ago. It is also possible that these galaxies do not exist now.

Thus, option (c) is correct.

Option a is: A galaxy in the local group.

Milky way galaxy is part of local group. Light from the other galaxies of the local group reach Earth in very few years. This means that these galaxies are not the oldest.

Thus, option (a) is incorrect.

Option b is - A galaxy observed at a distance of 5 billion light years.

1 light year = 3×108×365×24×36005×109 light year = 5×109×9.46×1015 m5×109 light year = 47.3×1024m

For a galaxy at 5 billion light years distance, it takes 5 billion years for light to reach us. It might exist or not currently. It would be an old galaxy but not older than the one present 10 billion light years away.

Thus, option (b) is incorrect.

Conclusion:

A galaxy observed at a distance of 10 billion light years would be oldest.