(Solution) If Hubble's Constant Is 75 Km/s/Mpc, Then The Age Of The Universe Is 13 Billion Years. Suppose It Were Discovered That Hubble's Constant Is Actually | Snapessays.com


(Solution) If Hubble's constant is 75 km/s/Mpc, then the age of the universe is 13 billion years. Suppose it were discovered that Hubble's constant is actually


Please answer the attached question.Deadline is an hour after this posting.  Thank you.  If Hubble's constant is 75 km/s/Mpc, then the age of the universe is 13 billion years. Suppose it

 

were discovered that Hubble's constant is actually larger than 75 km/s/Mpc. What effect would

 

this fact have on the calculated age of the universe?

 

A. The calculated age would be increased.

 

B. The calculated age could be increased or decreased, depending on the recession velocity

 

of the galaxy being investigated.

 

C. The calculated age would be decreased.

 

D. The calculated age would be the same.

 

What condition is necessary for the universe to be closed?

 

A. The cosmological constant must be large.

 

B. The density of the universe must be large.

 

C. The universe must have no mass in it.

 

D. The density of the universe must be small.

 

How does the diameter of a black hole (size of the event horizon) depend on the mass inside the

 

black hole?

 

A. The diameter does not depend on the mass.

 

B. The greater the mass, the greater is the diameter—until the mass becomes relatively large

 

and then the diameter decreases with increasing mass.

 

C. The greater the mass, the greater is the diameter.

 

D. The greater the mass, the smaller is the diameter.

 

A star ascending the red-giant branch for the second time in the asymptotic giant branch phase

 

will have

 

A. no fusion reactions; the star has used up all its nuclear fuel.

 

B. no nuclear reactions in the core, but a helium-fusion shell outside the core, which itself is

 

surrounded by a shell of hydrogen.

 

C. hydrogen-fusion reactions occurring in the core.

 

D. no nuclear reactions occurring in the core but hydrogen fusion in a shell outside the core.

 

What was the implication of the observation by Edwin Hubble that the Cepheid variable stars he

 

measured in the Andromeda “nebula” appeared to be very faint compared with what was

 

expected?

 

A. Hubble had discovered a new class of intrinsically faint Cepheid variable stars.

 

B. The Andromeda “nebula” was very far away and was in fact a galaxy.

 

C. Dust and gas in the “nebula” had severely reduced the light from these stars.

 

D. The observed period was affected by the intense gravitational field of the “nebula” as

 

predicted by general relativity, leading to incorrect luminosity determination.

 

What would you expect to be the overall color of a globular cluster of stars? Explain.

 

A. blue, because of the scattering of starlight from the dust surrounding the stars in the

 


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This question was answered on: May 23, 2022

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