The core of a star collapses during a supernova, forming a neutron star. Angular momentum of the core is conserved, so the neutron star spins rapidly. If the initial core radius is \(5.0 \times 10^{5} \mathrm{~km}\) and it collapses to 10.0 km, find the neutron star’s angular velocity in revolutions per second, given the core’s angular velocity was originally 1 revolution per 30.0 days.
Text Transcription:
5.0 times 10^5 km
Descriptive Astronomy Week of February 5-11 *Side note: I know we had an exam this week so the notes only consist of what was went over on Tuesday. Chapter 6: The Terrestrial Planets Mercury (The Lunar Doppelganger) o Closest planet to the sun. o Takes about 88 days to revolve around the sun. o Scarps- look like wrinkles on the surface. o Surface temperature can reach over 400 degrees. o Is at perpetual twilight. Permanent shadow at the poles. o Has almost no axial tilt. Tilt is 2.11 degrees. o Solar wind can kick neutrons off the planet surface and if there is water present the number of neutrons kicked off will decrease. Because of this prediction, it has been proven that Mercury has ice water at its north and south poles. Venus (Planet of “Tough” Love) o Atmosphere is thick because of CO 2 Pressure is 90 times that of Earth’s. o High in the atmosphere is sulfuric acid rain. Rain doesn’t touch the surface. o Has lightening that may be caused by volcanic activity. o No large bodies of water. o Has extensive lava flows, volcanic structures, and “Pancake Domes”. o Pancake Dome- also known as a “Lava Dome” is an unusual type of volcano found on Venus. Domes could spread for miles. o Only a few
