Consider a spacecraft that travels round-trip to the zeta ...

[rl]

Consider a spacecraft that travels round-trip to the zeta reticuli star system (distance 39.5 light-years) at 99 of the speed of light.
 
  If the round-trip travel time as measured from Earth is 79.8 years, how much time would pass for passengers on the spacecraft?
  A) 39.9 years
  B) 79.8 years
  C) 22.6 years
  D) 11.3 years

Question 2

In a hydrogen atom, a given electron has l = 7. How many values can m have?
 
  A) 6
  B) 7
  C) 15
  D) 33
  E) 98

[tandmlomax84]

Answer to Question 1

D

Answer to Question 2

C

[rl]

TYSM

[Chelseyj.hasty]

Gracias!