1. (a) Calculate Schwarzschild radius of a blackhole with mass same as our Sun. (S points) (b) Calculate its average density. points)

Q: Consider a neutron star of radius of 10 km and a mass of 1.4 M⊙ that has a surface layer of pure 1H.…

A: Given; Radius,R=10km=10×103mMass of a neutron star,mS=1.4×1.98×1030kgWein's…

Q: 1. Determine the radius of the event horizon if a star of mass 11 x 1030 kg explodes into a…

A: The radius of the event horizon is, R=2GMc2

Q: An isolated black hole in space would be difficult to detect because   a. there would be no light…

A: Black hole is a place in space-time where gravity pull is so strong that no matter can escape from…

Q: a. What is the event horizon radius [m] for the sun if it were to collapse to a Schwarzschild black…

A: Given information: Here, Msun is the Sun’s mass.

Q: 129. In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the…

A: The radius of the Sun is given as, R = 7×105 km The mass of Sun is given as, Ms = 2×1030 kg The mass…

Q: ) What is the so called cosmic reionization process?

A:

Q: What is the event horizon radius [m] for the sun if it were to collapse to a Schwarzschild black…

A:

Q: 2. (a) Calculate Schwarzschild radius of a blackhole with mass 10 kg. (Sipgints) (b) Calculate its…

A: The Schwarzschild radius or gravitational radius is the radius that defines the event horizon of a…

Q: The Schwarzschild radius of a black hole is the radius at which light cannot escape. By setting the…

A:

Q: emitted by a source at rest: i) at a radius of r = 2.2M outside a black hole of mass M =1 Mo. ii)…

A: Given: r= 2.2 M Φ=-6×10-5

Q: Problem 2. The redshift is defined to be the quantity Job — Xem Xem where Aob and Aem are…

A: Given that: z=λo-λemλem

Q: Problem 2: Black hole – the ultimate blackbody A black hole emits blackbody radiation called Hawking…

A:

Q: Problem 2. Assuming the scale factor a(t) evolves as a power law with time as - (-:-)^, where the…

A: Given Data: Let us consider the given , Scale factor a(t) =tt0Γ

Q: The Schwarzschild radius of a certain black hole is 30n kilometers. The mass of this black hole, in…

A:

Q: 1- can we obtain energy from a Votating black hole ?

A: Einstein's theory of general relativity , the theory that connects space, time, and gravity predicts…

Q: a)Define the term “standard candle” as used in cosmology.  b)The flux is defined asf(Dlum) =…

A:

Q: The speed of light in vacuum is 300,000 km/s. Suppose that the pulse rate of a pulsar is 0.001 s.…

A: Solution:   It is given that,   For a 0.001 s pulse time, the scale must be less than 300 Km. It…

Q: Andromeda galaxy is the closest large galaxy and is visible to the naked eye. Estimate its…

A:

Q: How much mass would a black hole contain if it has an event horizon equal in size to an average…

A: Given: Event horizon of black hole is equal to average-sized tennis ball.

Q: 2- If we consider the Saturn becomes a black hole with the same mass, then what will be his critical…

A: At a critical radius which is also known as Schwarzschild radius, the esacape velocity becomes equal…

Q: 2. Determine the Schwarzschild radius and the average density of a black hole formed by the…

A:

Q: a) Determine the wavelength of light (6563A) observed by a distant observer that is emitted by a…

A: The relation between observed wavelength λ and actual wavelength λ0 for gravitational red shift is…

Q: Suppose an alien race on a distant planet tries to send a message to us, with a laser (light).…

A: It is mentioned that, a black hole is present between the alien planet and the receiving planet.

Q: 5.5 One speculation in cosmology is that the dark energy may take the form of "phantom energy" with…

A: Phantom energy equation of state is, P=ωpρc2            ...........(1) Here, c is the speed of light…

Q: Consider a US Air Force launch of its latest GPS satellite from Cape Canaveral.  Radar tracking…

A: To calculate the minimum total delta V required to maneuver the spacecraft into the desired orbit,…

Q: 5. What is the mass of a black hole formed at the beginning of the universe that would explode by…

A: The time period: