Solutions to test #2 taken on Monday
... 20. (5) Two galaxies orbit one another at a separation of 500 kpc. Their orbital period is estimated to be 30 billion years. Use Kepler’s third law to find the total mass of the pair. Show all work. Possibly helpful values and equations: 1 pc = 3 x 1018 cm, 1 pc = 206,265 ...
... 20. (5) Two galaxies orbit one another at a separation of 500 kpc. Their orbital period is estimated to be 30 billion years. Use Kepler’s third law to find the total mass of the pair. Show all work. Possibly helpful values and equations: 1 pc = 3 x 1018 cm, 1 pc = 206,265 ...
Head-On Collision of Neutron Stars As A Thought Experiment
... Here we focus on the final collision and coalescence of the two stars. The complex interplay between hydrodynamics and gravitation, even in the idealized adiabatic case, requires that this late epoch be tackled by numerical means. The numerical integrations must be carried out in full general relati ...
... Here we focus on the final collision and coalescence of the two stars. The complex interplay between hydrodynamics and gravitation, even in the idealized adiabatic case, requires that this late epoch be tackled by numerical means. The numerical integrations must be carried out in full general relati ...
Black holes and the Structure of Space-Time
... the number of quanta (“atoms”) necessary to describe a black hole should be proportional to the area. All information about the black hole should be stored on its horizon. Usual hologram: a 2d surface encodes all information about a three dimensional object In string theory, which is a theory of qua ...
... the number of quanta (“atoms”) necessary to describe a black hole should be proportional to the area. All information about the black hole should be stored on its horizon. Usual hologram: a 2d surface encodes all information about a three dimensional object In string theory, which is a theory of qua ...
Electromagnetic waves
... -reflection (change in direction when bounce off a barrier) -refraction (change in the direction when pass from a medium to another) -diffraction (change in the direction when pass through an opening or around an obstacle /sideways spreading of waves into the region beyond a slit or around an obstac ...
... -reflection (change in direction when bounce off a barrier) -refraction (change in the direction when pass from a medium to another) -diffraction (change in the direction when pass through an opening or around an obstacle /sideways spreading of waves into the region beyond a slit or around an obstac ...
Zairamink_Lifecycle of a Star
... gravitational pull on your head compared to your feet (known as tidal forces) would rip you apart. But suppose you survived that. Once you cross the event horizon there is no turning back. Then the only thing to do is avoid the black hole itself at all costs. If you run into that singularity it will ...
... gravitational pull on your head compared to your feet (known as tidal forces) would rip you apart. But suppose you survived that. Once you cross the event horizon there is no turning back. Then the only thing to do is avoid the black hole itself at all costs. If you run into that singularity it will ...
Announcements Chapters 19-21: Waves and Sound Main Points
... Sound is just another wave! • Sound waves bounce off surfaces and can be bent (or refracted) • Sound waves interfere with each other • Sound waves carry energy (although not that much!) ...
... Sound is just another wave! • Sound waves bounce off surfaces and can be bent (or refracted) • Sound waves interfere with each other • Sound waves carry energy (although not that much!) ...
Radio waves belong to a family The
... Two categories of radio sources • Broadband – Spectral content of source is spread out across many of the EM bands (radio, visible, x-ray) – Observations made in the radio band should correlate with other parts of the EM spectrum (see Sun) ...
... Two categories of radio sources • Broadband – Spectral content of source is spread out across many of the EM bands (radio, visible, x-ray) – Observations made in the radio band should correlate with other parts of the EM spectrum (see Sun) ...
Solutions
... Thus, the gravitational force totally dominates, therefore we can ignore the radiation prassure. The gravitational force of a 2mm particle is 8 times larger, because it has 8 times the mass. Problem 3: You are located far from a radio station antenna on a line that is at an angle of 30° from the axi ...
... Thus, the gravitational force totally dominates, therefore we can ignore the radiation prassure. The gravitational force of a 2mm particle is 8 times larger, because it has 8 times the mass. Problem 3: You are located far from a radio station antenna on a line that is at an angle of 30° from the axi ...
NAME PER 2nd Semester Exam Study Guide. HW 40 points – due
... 42.) What is acceleration? A change in velocity (speed or direction or both) 43.) What is the difference between average speed and instantaneous speed? Average is calculated over a period of time, instantaneous is at one moment of time 44.) What is constant speed? An unchanging speed 45.) Calculate ...
... 42.) What is acceleration? A change in velocity (speed or direction or both) 43.) What is the difference between average speed and instantaneous speed? Average is calculated over a period of time, instantaneous is at one moment of time 44.) What is constant speed? An unchanging speed 45.) Calculate ...
Chapter 1: Physics Basics (PDF file)
... the same as the measured speed of light. In classical physics, waves were commonly viewed as requiring a medium to travel thru or in. Since Maxwell's equations did not provide the speed of light with respect to any reference frame, it was conjectured that a pervading 'ether' existed throughout the u ...
... the same as the measured speed of light. In classical physics, waves were commonly viewed as requiring a medium to travel thru or in. Since Maxwell's equations did not provide the speed of light with respect to any reference frame, it was conjectured that a pervading 'ether' existed throughout the u ...
the physical vacuum and gravity.
... hole, the star was not absorbed and more revolves around This black hole with a velocity of about 10,000 km / sec. Listed facts can not be explained on the basis of the theory of the existence of black holes, but from the assumption that gravity is caused by their neutrino flux you can explain. Howe ...
... hole, the star was not absorbed and more revolves around This black hole with a velocity of about 10,000 km / sec. Listed facts can not be explained on the basis of the theory of the existence of black holes, but from the assumption that gravity is caused by their neutrino flux you can explain. Howe ...
AMUSE-Virgo on the survival of super-massive black holes
... Duty cycle of super-massive black hole (highly sub-Eddington) activity ...
... Duty cycle of super-massive black hole (highly sub-Eddington) activity ...
Gravitational Mass Defect - Science and Education Publishing
... fibers break themselves at a distance by 3 kpc from the nucleus (gas it had time to reach this place), then all enumerated phenomena made it possible to arrive at the conclusion that in the nucleus NGC 3034 about one-and-ahalf million years ago occurred the immense explosion, which caused ejection w ...
... fibers break themselves at a distance by 3 kpc from the nucleus (gas it had time to reach this place), then all enumerated phenomena made it possible to arrive at the conclusion that in the nucleus NGC 3034 about one-and-ahalf million years ago occurred the immense explosion, which caused ejection w ...
Lecture 18
... Idea: stars today never collide, but collisions would be more frequent: • In young clusters where stars form, which are much denser than the Galaxy in the Solar neighborhood. • Young stars have disks, so they present a larger cross-section for collisions. e.g. the core of the Orion nebula cluster Sp ...
... Idea: stars today never collide, but collisions would be more frequent: • In young clusters where stars form, which are much denser than the Galaxy in the Solar neighborhood. • Young stars have disks, so they present a larger cross-section for collisions. e.g. the core of the Orion nebula cluster Sp ...
Mass vs. Weight and Gravity
... gravitational force between two objects at the same time. Differences in distance have a greater effect on gravity than do the differences in mass. For example, the gravitational force between the Earth and Moon is stronger than the force between the Earth and the Sun. Even though the Sun has such a ...
... gravitational force between two objects at the same time. Differences in distance have a greater effect on gravity than do the differences in mass. For example, the gravitational force between the Earth and Moon is stronger than the force between the Earth and the Sun. Even though the Sun has such a ...
