Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. The density of a neutron star is roughly 10¹4 times as great as that of ordinary solid matter. Suppose we represent the star as a uniform solid, rigid sphere, both before and after the collapse. The star's initial radius was 7.0x105 km (comparable to our sun); its final radius is 18 km.

Q: A pulsar may form when a star of medium mass dies. On July 4, 1054 CE, Chinese astronomers witnessed…

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Q: After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf…

A: (a) The expression for the density of the white dwarf star is, ρ=MV Here, M is the mass of the dwarf…

Q: What is the average density of a neutron star that has the same mass as the sun but a radius of only…

A: Given,  mass of sun = mass of neutron star (m) = 1.989×1030 kg  radius = 86.31 km

Q: Find the mass of the block 0 <x< 4,0 < y< 8,0 < z< 1, whose density 8, is given by 8 = 2 – z for 0)…

A: The density is given by: ρ=2-z The mass of the block is calculated as:…

Q: 19. A space probe is flying by Jupiter (M = 1.9 x 1027 kg) at a distance of 400,000 km from the…

A: Given data:  Mass (M) = 1.9×1027 kg Altitude (h) = 400000 km = 4.00×108 m Radius (R) = 7.15×107 m…

Q: The planet Saturn has an average radius of 9 Earth radii and a density of 0.7 g/cm3 (yes, less dense…

A: The distance at which a moon can orbit a planet without disintegrating by its tidal forces is called…

Q: A star, which is 2.2 x 1020 m from the center of a galaxy, revolves around that center once every…

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Q: what would its period (in s) be if no mass were ejected and a sphere of uniform density can model HD…

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Q: M XCM M A binary system is shown by the image above. It consists of two stars of equal mass. These…

A: This problem can be solved using the concept of reduced mass.

Q: A visual binary is composed of two stars A and B. This visual binary has a rotation period of 59.94…

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Q: A star, which is 2.1 x 1020 m from the center of a galaxy, revolves around that center once every…

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Q: A planet has a mass of M1, a radius of R1, and a density of ρ1. A second planet has a mass of M2, a…

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Q: n 1999, scientists discovered a new class of black holes with masses 100 to 10000 times the mass of…

A: The radius of sun is The average density of sun is The diameter of the moon is The mass of the black…

Q: Convert 9.021 x 1048 kg to Jupiter Masses (MJ). The mass of Jupiter is known as MJ = 1.898×1027 kg.…

A: Given mass M = 9.021 x 1048 kg also 1 MJ = 1.898×1027 kg.

Q: Convert 1.39 x 10^9 kilograms to Jupiter Masses, MJ. The mass of Jupiter is known as MJ = 1.898×1027…

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Q: An exoplanet revolves around a massive star. The radius of the orbit that the exoplanet has is 4.56…

A: Keplers third law of motion relates the time period of revolution of a moon around a planet or that…

Q: We know that we can use Kepler's Laws to determine the orbits objects around one another. We also…

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Q: A star with mass m = 2.624 x 1030 kg revolves around the center of mass of the Milky Way galaxy in…

A: Given, Radius of orbit is 3.7*1020 meter and velocity is 400,000 m/s

Q: The mass of a star is 1.99·1031 kg and its angular velocity is 1.60E-7 rad/s. Find its new angular…

A: Given data: The mass of the star is m=1.99x1031 kg. The initial angular velocity of the star is…

Q: The life expectancy E of a main-sequence star depends on its mass M. The relation is given by the…

A: Given:Formula for life expectancy of a main-sequence star:  E=M-2.5Sun's total life expectancy: 10…

Q: NOTE: Your answer suggests that you have assumed constant gravitational

A: Explained as, F=-GMMR+y2

Q: Imagine a particular exoplanet covered in an ocean of liquid ethane. At the surface of the ocean,…

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Q: A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 2.9 x…

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Q: The astronomer claims that the frequency, f, of a vibrating star depends on its radius R, density r…

A: Write the dimensional units of frequency (f), radius (R), density (r), that is the density per unit…

Q: The rate at which a nebular cloud rotates increases as the cloud collapses to form systems of stars…

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Q: 1. Consider our Sun - it is in orbit around the center of our Milky Way Galaxy. The velocity of the…

A: The Sun orbits around the center of the milky way with an orbital velocity of 250 km/s.  Considering…

Q: mass of the black hole? The mass of the sun is M, = 1.99 x 1050 kg. (Give your answer in terms of…

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Q: After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf…

A: The mass of the dwarf, Mdwarf=1.991×1030 kg   The radius of the dwarf, r=6.38×106 m

Q: Suppose you observe a binary system containing a main-sequence star and a brown dwarf. The orbital…

A: Given, The average separation, r1=r2=1AU Let the mass of the main-sequence star be M1 and M2 is the…

Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.