For absorption spectra to exist A) the light source must be a ...

[mckennatimberlake]

For absorption spectra to exist
 
  A) the light source must be a gas.
  B) partially absorbent material must exist between the light source and the spectroscope slit.
  C) the spectroscope must be equipped with an absorption cell.
  D) all of the above
  E) none of the above

Question 2

A person running in place on an exercise machine for 10 minutes uses up 17 Calories. Another person exercises by repeatedly lifting two 2.5-kg weights a distance of 50 cm.
 
  How many repetitions of this exercise are equivalent to 10 minutes of running? A) 730
  B) 1450
  C) 1500
  D) 2200
  E) 2900

[brbarasa]

Answer to Question 1

Answer: B

Answer to Question 2

E