Which effect has been useful (and successful) in the search for and identification of black holes in the universe

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.

What occurs during a combustion reaction

In a series circuit the __ is the same at every point