Physics Exam: Stars and Planets

0.3 R⊙

10^(-3) L⊙

It emits as a blackbody.

<p>Determine the surface temperature of the star and calculate the wavelength at which its spectrum will peak.</p> Signup and view all the answers

<p>Infrared or far-infrared range</p> Signup and view all the answers

<p>It is likely a low-mass, low-temperature star.</p> Signup and view all the answers

<p>The main sequence is the stage of a star's life where it fuses hydrogen into helium, which is the most stable and long-lasting phase.</p> Signup and view all the answers

<p>0.104 R⊕/9.1 R⊕ = 0.011</p> Signup and view all the answers

<p>Sunspots are dark regions on the Sun's surface, cooler than the surrounding areas, with strong magnetic fields and intense solar activity.</p> Signup and view all the answers

<p>0 hours</p> Signup and view all the answers

<p>Sunspots are areas of strong magnetic fields, which are amplified by the Sun's differential rotation, leading to the formation of active regions and sunspot cycles.</p> Signup and view all the answers

<p>Ganymede, despite being farther away, has a stronger tidal effect on Jupiter due to its larger mass and resulting differential gravitational force.</p> Signup and view all the answers

<p>The Earth is between the Sun and Jupiter.</p> Signup and view all the answers

<p>P = GMρ/ 2R</p> Signup and view all the answers

<p>Kepler's Second Law states that the line connecting the planet to the Sun sweeps out equal areas in equal times, which is a direct result of the conservation of angular momentum (mvr).</p> Signup and view all the answers

<p>Main sequence stars lie on the diagonal, the Sun is near the middle, red giants are at the top right, and white dwarfs are at the bottom left.</p> Signup and view all the answers

<p>Using the vis-viva equation, the asteroid's speed can be calculated at perihelion and aphelion. To make the orbit circular, the speed would need to change by a factor dependent on the eccentricity and semi-major axis.</p> Signup and view all the answers

<p>The synodic period of Jupiter is shorter than its sidereal period.</p> Signup and view all the answers

<p>Detecting extrasolar planets provides a lot of information about the final outcome of planet formation.</p> Signup and view all the answers

<p>Radiometric dating can help determine the formation of our solar system by providing information about the age of rocks and meteorites, which can be used to reconstruct the sequence of events that led to the formation of our solar system.</p> Signup and view all the answers

<p>Nonrelativistic electron degeneracy pressure refers to the pressure exerted by degenerate electrons in a white dwarf star, which supports the star against collapse.</p> Signup and view all the answers

<p>The relationship between pressure and density in electron degeneracy pressure results in a scaling of the radius with the mass of the star, such that the most massive white dwarfs are expected to have the smallest radii, with R ∝ M^(-1/3).</p> Signup and view all the answers

<p>This suggests that the star has an orbiting companion, possibly a planet, which is causing the star's position to oscillate.</p> Signup and view all the answers

<p>You can determine that the object is a planet and not a star by analyzing its mass, orbit, and other characteristics, such as its surface temperature and luminosity.</p> Signup and view all the answers

<p>Stefan-Boltzmann equation</p> Signup and view all the answers

<p>Planck distribution</p> Signup and view all the answers

<p>3</p> Signup and view all the answers

<p>arcseconds</p> Signup and view all the answers

<p>Doppler effect</p> Signup and view all the answers