What type of em wave travels the fastest?

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Ais not a mixture. colloid compound suspension solution

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging