What is the magnification of a telescope and eyepiece if the telescope objective has a focal length ...

What is the magnification of a telescope and eyepiece if the telescope objective has a focal length of 200 cm and the eyepiece has a focal length of 2.0 cm
 
  a. 400 times
  b. 4000 times
  c. 100 times
  d. 1000 times
  e. 40 times

Question 2

A Type I supernova is believed to occur when
 
  a. the core of a massive star collapses.
  b. hydrogen detonation occurs.
  c. a white dwarf exceeds the Chandrasekhar limit.
  d. the cores of massive stars collapse.
  e. neutrinos in a massive star become degenerate and form a shock wave that explodes the star.

Question 3

The resolving power of an optical telescope with a diameter of 232 cm is
 
  a. 0.05 arc seconds.
  b. 232 arc seconds.
  c. 2.32 arc seconds.
  d. 5 arc seconds.
  e. 11.6 arc seconds.

Question 4

The Chandrasekhar limit tells us that
 
  a. accretion disks can grow hot through friction.
  b. neutron stars of more than 3 solar masses are not stable.
  c. white dwarfs more massive than 1.4 solar masses are not stable.
  d. stars cannot travel through space too fast
  e. stars with a mass less than 0.5 solar masses will not go through helium flash.