When is the magnitude of a vector + b vector equal to the magnitude of a vector - b vector

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 distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2