subject
Physics, 13.07.2019 06:20 brainguy124

It is known that most of the mass of galaxies is some exotic material that doesn't interact with light or normal matter. let's assume that this "dark matter" is due to a new elementary . like alaska in the winter, alaskonium in the galaxy is cold and dark. we will assume that alaskonium is a fermion and that it is so cold that it is degenerate; a gravitationally bound, nonrelativistic, degenerate gas. take the total mass and radius of the gas to be that of a typical galaxy, m- 1010 solar masses and r- 105 light years. a) what is the rest mass (energy) of the alaskonium particle? give answer in ev. b) what is the fermi energy? c is our assumption that alaskonium is nonrelativistic validated? what are the implications if it is not?

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 22.06.2019 04:00, katieleeisaacs8368
Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?
Answers: 1
image
Physics, 22.06.2019 07:20, coolusername1314
The softest and hardest minerals are: softest hardest
Answers: 1
image
Physics, 22.06.2019 11:30, animaljamissofab
Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?
Answers: 3
image
Physics, 22.06.2019 13:40, sbudlove2838
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th
Answers: 1
You know the right answer?
It is known that most of the mass of galaxies is some exotic material that doesn't interact with lig...

Questions in other subjects:

Konu
History, 14.01.2021 20:00