| Problem #1:
a. Make sure you get a number with
units #/m^2 or neutrinos/m^2.
b. Note that this problem requires
the use of the distance earth-supernova and the area of a sphere with that
distance as a radius. You will get a number that's disgustingly large!
c. Keep track of the units.
Problem #2:
b. The number of electrons in the
SUN is roughly the mass of sun divided by the mass of one hydrogen atom.
Assume that each electron occupies
a volume of the white dwarf divided by the number of electrons. Look at
the units (m^3). Remember that you are looking for distance in meters.
How does one get from m^3 to m?
c. The uncertainty principle is
momentum = h / (distance between
electrons).
Also: the distance between electrons
in regular solids: since there are 10^30 in a cubic meter, that's 10^10
x 10^10 x 10^10 electrons, or 10^{-10} m between electrons.
d. Just one -two sentences here.
Look up March 20 notes in your notebook.
Problem #3: due NEXT thursday, March
30, 2000!!! (We are slightly behind there)
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