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3. Plot a graph of luminosity (in terms of the Sun's luminosity) as a function of...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with (a)0.2-solar mass, (-5 x 10yr) (b) 3.0 solar mass, (4 x 10 yr) (c)10.0-solar mass x 10 yr) 2. A star is lying 20 pc from the Sun. The star's position on the sky is observed to move 5 arc sec per year relative to background stars. What is the star's transverse (perpendicular to the line of sight) velocity? If the observed red-shift is...
#2 please ! Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your...
#2 please !
Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your answers on a separate sheet and show your work 1. The protesproton chain effectively c erta hyre en into hem according to 4 He. A Helium wus weighs 6.64518 x 10 IT kg and Hydrogen mucha proton) welches 1.67262 x 10 Workout the change in a when I kg of Hydrogen is converted completely into Helium 4. Convert the change in mass Per burning...
10. This is more of a discussion problem Imagine that you were asked to estimate the...
10. This is more of a discussion problem Imagine that you were asked to estimate the Hill Sphere of the Sun Think about what this would physically mean. It would be the point in space where the Sun's gravitational influence (its mass is 2 x1030 kg) is exceeded by that of our neighbouring stars. Far out. This is the Alpha Centauri system - yes, it's not a single star, just to confuse the problem. But let's treat it as one....
Other Stars Complete the table below for stars in terms of solar units and SI units. (Yes it is possible to look these...
Other Stars Complete the table below for stars in terms of solar units and SI units. (Yes it is possible to look these up, but I am expecting you to be able to use the proportions above to find these values) 3. Peak Luminosity Intensity Radius Mass Temperature Emission A Star Le le nm kg Te 12M. 5.2858 x10"m Antares 3570 к 1.6801 2.3072 x10 kg 44.1 r x1029w Aldebaran Sun 5.4M. 2.6081 x1010 m 0.896 la Polaris 10.6 L...
Problem 4 In 1933 Fritz Zwiky used the virial theorem to demonstrate the existence of dark...
Problem 4 In 1933 Fritz Zwiky used the virial theorem to demonstrate the existence of dark matter (even though nobody believed him for the subsequent 40 years) in the Coma cluster of galaxies. The demonstration assumes that the Coma galaxies have a random spherical distribution around the center of gravity of the cluster, and that their velocity is also distributed randomly. With these hypothesis the average potential energy of the cluster can be approximated with the potential energy of a...
Andromeda Galaxy, M31, is considered a sister galaxy to Milky Way galaxy. One similarirty is their...
Andromeda Galaxy, M31, is considered a sister galaxy to Milky Way galaxy. One similarirty is their masses (a) Astronomers have used orbiting satellite galaxies to calculate the mass. At a distance of 190 kpc from the center of M31, the circular velocity of these objects is 150 km/s. Using the measurements and tools that astronomers use, calculate the total mass of M31 in units of the mass of the Sun, M. Watch your units in your calculations! Here are few...
3. In this problem, we are going to examine the supermassive black hole in the center...
3. In this problem, we are going to examine the supermassive black hole in the center of our galaxy, Sagittarius A.. (a) (15 points) We can calculate its mass using the orbits of stars gravitationally bound to it in the same way that you can use the Earth's orbit to calculate the mass of the Sun). The orbit of a star, S2, has been fully mapped out. Its period is 15.24 yr and semi-major axis length is 980 AU. Using...
1) The missing mass problem is a) starlight is observed, but there is no evidence of...
1) The missing mass problem is a) starlight is observed, but there is no evidence of mass b) the amount of mass measured is less than the amount of light measured c) starlight follows the same distribution as mass d) there are indications of mass from motion but no light e) spacetime is warped by mass 2) The rotation curve of the Galaxy is a) flat in the core, planet-like in the disk b) wheel-like in the core, flat in...
choose correct answer. no explanation needed QUESTION 10 How do astrophysicists account for neutrino emission from...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Only A and B please :) The equation mgy for gravitational potential energy is valid only...
Only A and B please :)
The equation mgy for gravitational potential energy is valid only for objects near the surface of a planet. Consider two very large objects of mass m_1 and m_2, such as stars or planets, whose centers are separated by the large distance r. These two large objects exert gravitational forces on each other. The gravitational potential energy is U = -Gm_1 m_2/r where G = 6.67 times 10^-11 Nm^2/kg^2 is the gravitational constant. (a) Sketch...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with (a)0.2-solar mass, (-5 x 10yr) (b) 3.0 solar mass, (4 x 10 yr) (c)10.0-solar mass x 10 yr) 2. A star is lying 20 pc from the Sun. The star's position on the sky is observed to move 5 arc sec per year relative to background stars. What is the star's transverse (perpendicular to the line of sight) velocity? If the observed red-shift is...
#2 please !
Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your answers on a separate sheet and show your work 1. The protesproton chain effectively c erta hyre en into hem according to 4 He. A Helium wus weighs 6.64518 x 10 IT kg and Hydrogen mucha proton) welches 1.67262 x 10 Workout the change in a when I kg of Hydrogen is converted completely into Helium 4. Convert the change in mass Per burning...
10. This is more of a discussion problem Imagine that you were asked to estimate the Hill Sphere of the Sun Think about what this would physically mean. It would be the point in space where the Sun's gravitational influence (its mass is 2 x1030 kg) is exceeded by that of our neighbouring stars. Far out. This is the Alpha Centauri system - yes, it's not a single star, just to confuse the problem. But let's treat it as one....
Other Stars Complete the table below for stars in terms of solar units and SI units. (Yes it is possible to look these up, but I am expecting you to be able to use the proportions above to find these values) 3. Peak Luminosity Intensity Radius Mass Temperature Emission A Star Le le nm kg Te 12M. 5.2858 x10"m Antares 3570 к 1.6801 2.3072 x10 kg 44.1 r x1029w Aldebaran Sun 5.4M. 2.6081 x1010 m 0.896 la Polaris 10.6 L...
3. In this problem, we are going to examine the supermassive black hole in the center of our galaxy, Sagittarius A.. (a) (15 points) We can calculate its mass using the orbits of stars gravitationally bound to it in the same way that you can use the Earth's orbit to calculate the mass of the Sun). The orbit of a star, S2, has been fully mapped out. Its period is 15.24 yr and semi-major axis length is 980 AU. Using...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Only A and B please :)
The equation mgy for gravitational potential energy is valid only for objects near the surface of a planet. Consider two very large objects of mass m_1 and m_2, such as stars or planets, whose centers are separated by the large distance r. These two large objects exert gravitational forces on each other. The gravitational potential energy is U = -Gm_1 m_2/r where G = 6.67 times 10^-11 Nm^2/kg^2 is the gravitational constant. (a) Sketch...
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