Observations of spiral galaxy show a major axis of 1.5x105 ly and a minor axis equal to 80% of the major axis. if the radial velocity of a gas cloud located in the spiral arms is calculated at 156 km/s, what is the true rotational velocity of the cloud?

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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.

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