When an atom emits a photon, the atom's mass A) decreases ...

[danielfitts88]

When an atom emits a photon, the atom's mass
 
  A) decreases slightly.
  B) remains exactly the same.
  C) increases slightly.
  D) could do any of the above.
  E) becomes negative--i.e., less than zero.

Question 2

For every 100 gallons of gasoline you use in your car, the amount that actually goes into moving the car down the road is roughly
 
  A) 10 gal. B) 50 gal. C) 2 gal. D) 98 gal. E) 75 gal.

[Tabitha_2016]

Answer to Question 1

A

Answer to Question 2

A

[danielfitts88]

Gracias!

[tranoy]

Excellent