Author Question: Which two of the following places are nearest to each other? Place A at latitude 20N, longitude 90W ... (Read 38 times)

xclash · **on:** Jul 28, 2018

Which two of the following places are nearest to each other? Place A at latitude 20N, longitude 90W Place B at latitude 30N, longitude 90W Place C at latitude 30N, longitude 75W Place D at latitude 20N, longitude 75W

Question 2

Light waves travel fastest in
a. water.
b. glass.
c. a vacuum.
d. air.
e. none of these; they travel at the same speed in all these media.