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?

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.