The size of the Milky Way is determined from studying stars in globular clusters.

Question

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Answer 1

Question

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

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Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? Please answer parts a-B. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places. DONT FORGET TO DRAW VECTORS! ONLY USE BASIC FORMULAS TAUGHT IN PHYSICS. distance = speed * time.

Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? c) If the driver’s average rate of acceleration is -9.5 m/s2 as he slows down, how long does it take him to come to a stop (use information about his speed of 28.9 m/s but do NOT use his reaction and movement time in this computation)? Please answer parts a-c. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places unless stated otherwise.…

How is it that part a is connected to part b? I can't seem to solve either part and don't see the connection between the two.

Answer 2

Question

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

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Answer 3

Question

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

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Answer 4

Question

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

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Answer 5

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

Answer 6

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

Answer 7

Chapter 20, Problem 1QP

To determine

The size of the Milky Way is determined from studying stars in globular clusters.

Answer 8

Expert Solution & Answer

Answer to Problem 1QP

Option (c) RR Lyrae is the correct option.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

A globular cluster is a spherical collection of stars that orbits a galactic core. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes, and relatively high stellar densities toward their centers.

RR Lyrae stars are easy to spot in globular clusters because they are relatively luminous and have a distinctive light curve. They lie in the instability strip of the Hertzsprung-Russell (H-R) diagram and suffer instabilities that cause their size to periodically change. This change in size also changes the temperature of the star giving rise to their variability.

The size of the Milky Way is determined from studying RR Lyrae stars in globular clusters.

Conclusion:

Since the period-luminosity relationship to determine the distances to globular clusters, option (c) is correct.

RR Lyrae is easy to spot in the globular cluster than the Cepheid variable. Thus, option (a) is incorrect.

Blue supergiant are found towards the top left of H-R diagram. Thus, option (b) is incorrect.

The density of stars inside a globular cluster is significantly higher than the density of stars around the Sun. Thus, option (d) is incorrect.

Answer 12

Ch. 20.1 - Prob. 20.1CYU Ch. 20.2 - Prob. 20.2CYU Ch. 20.3 - Prob. 20.3CYU Ch. 20.4 - Prob. 20.4CYU Ch. 20 - Prob. 1QP Ch. 20 - Prob. 2QP Ch. 20 - Prob. 3QP Ch. 20 - Prob. 4QP Ch. 20 - Prob. 5QP Ch. 20 - Prob. 6QP

The size of the Milky Way is determined from studying stars in globular clusters.

Concept explainers

The size of the Milky Way is determined from studying stars in globular clusters.

Answer to Problem 1QP

Explanation of Solution

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