Electromagnetic Signals

1. Between 320 and 350 ms^-1
2. 3 x 10⁸ ms^-1 = 1.875 x 10⁵ miles per second
3. 1. 3 x 10⁸ m
   2. 6 x 10⁹ m
   3. 1.2 x 10⁴ m
   4. 8.1 x 10⁶ m
   5. t = 1800 s
      d = 5.4 x 10¹¹ m
   6. t = 172 800 s
      d = 5.184 x 10¹³ m
   7. t = 3.1536 x 10⁷ s
      d = 9.4608 x 10¹⁵ m
4. t = 480 s
   d = 1.44 x 10¹¹ m = 1.44 x 10⁸ km = 144 000 000 km
5. d = 400 x 10⁶ m = 4 x 10⁸ m
   t = 4 / 3 s = 1.333 s
6. 9.4608 x 10¹⁶ m
7. 905 yr. 1092 AD