The singularity of a black hole

The singularity of a black hole
 
  a. is found outside the event horizon.
  b. is located within the event horizon.
  c. can only be located if the black hole is in a binary system.
  d. doesn't exist since all black holes have a finite size.

Question 2

____ has a negative charge and a mass about 1800 times small than a proton.
 
  a. A neutron
  b. An electron
  c. A molecule
  d. A nucleus
  e. An isotope

Question 3

If the inner accretion disk around a black hole has a temperature of 106 K, at what wavelength will it radiate the most energy? Hint: wavelength in nm =3,000,000/T in K
 
  a. 106 nm
  b. 3 nm
  c. 3 x 106 nm
  d. 1 nm
  e. 3 x 1011 nm

Question 4

The ____ is responsible for binding the electrons to the nucleus.
 
  a. Kirchhoff's law
  b. ground state
  c. temperature
  d. Coulomb force
  e. Balmer series

Question 5

The escape velocity of an object depends on I. the mass of that object. II. the mass of the object trying to escape. III. the distance from the center of the object and the escaping object. IV. the speed of light.
 
  a. I, II, III, & IV
  b. I & II
  c. I & III
  d. I, II, & IV
  e. I, III, & IV