○○○hypersonic⪢⪢
U.S. officials now believe the objects are mostly likely not secret U.S. technology but they worry they could be advanced systems by another country, potentially Russia or China, both known to test hypersonic systems.
http://qindex.info/i.php?x=15561
○○○commit⪢⪢
Because UAPs pose potential flight safety and general security risk we are committed to a focused effort to determine their origins.
http://qindex.info/i.php?x=20608
○○○embrace⪢⪢
As the navy and army continue to embrace the potential of unmanned aircraft, pilots may soon find themselves spending much more time out of harm's way.
http://qindex.info/i.php?x=23644
• Electric Potential, Current, and Resistance
• 17 Kinetic Energy and Potential Energy
