10. Which explains the relationship between light, sound, and earthquake waves? A All have the same wavelength. B All travel at the same speed. c. All are the same frequency. D. All transfer energy.

D. All transfer energy.

Explanation:

move at different speeds in different materials. Waves are moving energy. Light waves are unique in their ability to travel through a vacuum (space).

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: