Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 15, Problem 7P
To determine
Schwarzschild radius of the sun.
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Calculate the Schwarzschild radius of the Sun.
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Chapter 15 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 15 - Prob. 1QFRCh. 15 - Prob. 2QFRCh. 15 - Prob. 3QFRCh. 15 - Prob. 4QFRCh. 15 - Prob. 5QFRCh. 15 - Prob. 6QFRCh. 15 - Prob. 7QFRCh. 15 - Prob. 8QFRCh. 15 - Prob. 9QFRCh. 15 - Prob. 10QFR
Ch. 15 - Prob. 11QFRCh. 15 - Prob. 12QFRCh. 15 - Prob. 13QFRCh. 15 - What is nonthermal radiation?Ch. 15 - What happens when a gravitational wave moves? What...Ch. 15 - What is a black hole? Are they truly black? What...Ch. 15 - Prob. 17QFRCh. 15 - Prob. 18QFRCh. 15 - Prob. 19QFRCh. 15 - Prob. 20QFRCh. 15 - Prob. 1TQCh. 15 - Prob. 2TQCh. 15 - Prob. 3TQCh. 15 - Prob. 5TQCh. 15 - Prob. 6TQCh. 15 - Prob. 7TQCh. 15 - Prob. 8TQCh. 15 - Suppose you jumped into a black hole feet first....Ch. 15 - Prob. 10TQCh. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10PCh. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 1TYCh. 15 - Prob. 2TYCh. 15 - Prob. 3TYCh. 15 - Prob. 4TYCh. 15 - Prob. 5TYCh. 15 - Prob. 6TYCh. 15 - What evidence leads astronomers to believe that...Ch. 15 - (15.3) The Schwarzschild radius of a body is (a)...Ch. 15 - Prob. 9TYCh. 15 - Prob. 10TY
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- Calculate the Schwarzschild radius for the sun and Earth.arrow_forwardA light of wavelength 620 nm is emitted from the following four places. What wavelength is observed for this light by an observer a long distance away? (The objects are not moving with respect to the observer) The surface of a 0.84 solar mass white dwarf that has a radius of 708000 km: ? The surface of a 2.52 solar mass neutron star that has a radius of 14.2 km: 2 Schwarzschild radii from a 20 solar mass black hole: ? 1.048 Schwarzschild radii from a 20 solar mass black hole: ?arrow_forwardTwo stars in a binary system, are seen edge-on from Earth. The HB line emitted by Star 1 varies between 486.162 nm and 486.186 nm, while that emitted by Star 2 varies between 486.140 nm and 486.208 nm. Assuming the stars are on a circular orbit, calculate the orbital velocity of the two stars and their mass ratio. What additional observational data is required to determine the mass of the system?arrow_forward
- = 2000 K and a radius of R, A young recently formed planet has a surface temperature T Jupiter radii (where Jupiter's radius is 7 x 107 m). Calculate the luminosity of the planet and 2 determine the ratio of the planet's luminosity to that of the Sun.arrow_forwardCalculate the Schwarzschild radius of an average human weighing 65 kg.arrow_forwardWhat is the Schwarzschild radius of a star with a mass of z × 10 Mun? The answer is in 106m. So if you calculated an answer like 157,895,250 convert it like this: 106 157, 895, 250 × 157.9 and that is what you will input 100000 z =2.57 y =3 M Sun = 2 × 10³⁰ kg =arrow_forward
- The star HD 69830's mass is 1.7 ✕ 1030 kg, its radius is 6.3 ✕ 105 km, and it has a rotational period of approximately 35 days. If HD 69830 should collapse into a white dwarf of radius 7.8 ✕ 103 km, what would its period (in s) be if no mass were ejected and a sphere of uniform density can model HD 69830 both before and after?arrow_forwardThe relationship between the average luminosity and pulsation period for Cepheid variable stars can be written L = L⊙P3.7, where the period P is measured in days. A cepheid variable is observed in a distant galaxy, and is determined to have a pulsation period of 50 days. The average flux received from this star is measured to be 2.14×10−16Wm−2. Determine the distance to the galaxy and express your answer in units of Mpc.arrow_forwardAfter the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth. (a) Calculate the average density of the white dwarf (in kg/m³). kg/m3 (b) Calculate the surface free-fall acceleration (in m/s). m/s? (c) Calculate the gravitational potential energy (in J) associated with a 3.38 kg object at the surface of the white dwarf. J (d) What If? The escape speed from the "surface" of the Sun, or a distance equal to its radius, is 617.5 km/s. What would be the escape speed (in km/s) from the surface of the white dwarf? km/sarrow_forward
- What will be the Schwarzschild radius of Earth?arrow_forwardThe velocity curve for a double spectroscopic binary is shown in the sketch. The system is viewed edge-on, i.e., with an inclination angle of i = 90°, so that the maximum possible Doppler shifts for this system are observed. line 400 So = U, Ani 300 200 loo = v Ain i 100 -100 -200 -300 400 • 1 2 3 • s 7 a 10 Time (days) Find the mass of star 1, mı, in terms of solar masses. 1 solar mass = 2x1030kg Round your answer to three significant figures. Doppler Velocity (20su)arrow_forwardA white dwarf in a binary system has a radius of 7000 km and a mass equal (minus an infinitesimal amount) to the Chandrasekhar limit of $1.4 M_{\text {sun }}$. The companion transfers an infinitesimal amount of mass to the white dwarf which is enough to send it over the Chandrasekhar limit and it collapses to a neutron star with a radius of 14 km . Calculate the amount of gravitational potential energy released. NOTE: we can assume that the mass of the neutron star once is triggered and the mass of the WD are both equal to the Chandrasekhar mass in this case.arrow_forward
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